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Forum: Pentax SLR Lens Discussion 20 Hours Ago  
FA 100-300 vs Pentax 55-300 PLM
Posted By cyberjunkie
Replies: 6
Views: 412
I have both versions of the 100-300, the Pentax-F (same optics of the FA owned by the OP) and the Pentax-FA f/4.7 "silver".
The first one has the usual wobbly focusing, typical of that generation of objectives, but the internal construction is not bad at all. It performs more or less in line with an old Sigma Apo 70-300 I also own, but has an important limitation. The minimum focusing distance is not adequate, while the Sigma can reach a very good magnification ratio, and performs rather well shooting close-up's.
The later silver version is definitely better than both Sigma and Pentax-F, and has one of the best price/performance ratios I ever found.
Build quality is rather questionable, but IQ at medium diaphragms is much, much better than I expected. It's a very recent acquisition, bought because I don't have the 100-300 with me and the Sigma got massively infected by fungi.
My new 100-300 looks nice, but has two fungus spots right in the middle of the frame, which don't seem to affect contrast. This makes its performance even more surprising!

I also have the first version of the 55-300.
I would have been happier with the WR version, but now it doesn't matter that much anymore, cause I'm shooting full frame 99% of the times.
Now it's my wife shooting APS-C, and the 50-200 WR is a better choice for her WR body.
AF was always good, much better than the 100-300 and better than the Sigma. I guess the new PLM version would be a real lightning :)
On average, IQ was also better than the other two lenses, though I'm not so sure it's so much better than the "silver".

The two FA lenses were designed to provide more coverage, and have a rather old optical design, so I don't know if it actually makes sense to stick to an old lens of average performance, unless there is a good chance to acquire a K-1 in the near future... and if the high performance/expensive lenses that will fit that body will be mainly primes. Which is exactly what I chose to do: zooms are for convenience, but the main investment is in good primes and vintage glasses with a "particular" optical signature.
I'm using my zooms less and less, cause I can't renounce the beautiful rendition some old (and unfortunately expensive) prime lenses can give.

Cheers

Paolo
Forum: Pentax News and Rumors 1 Day Ago  
Mitakon Speedmaster 135/1.4 now for Pentax?
Posted By cyberjunkie
Replies: 29
Views: 1,967
IMHO, none! :)
I mean, they need to actually produce a few samples, loan them to testers, and have the reviews published on the Internet (on YouTube it works great, big sites would never review the lens in a reasonable time, and i doubt Mitakon would pay..).
Of course the reviews will be positive, with modern software designing a prime is rather simple.
Building it, containing costs and still keeping tolerances under check, the elements centered, the infinity stop were is meant to be, etc etc, is another thing... but I guess the examples sent for tests will be checked!
If a couple hundreds objectives get sold it would be beneficial, though I doubt a similar project was devised to earn a profit.
It will prove (again) that a Chinese company unknown to most, or disdained by those who knew about the brand, is actually capable to produce "dream lenses" of good quality. It's quite a statement, and probably costs way less than a decent advertising campaign targeted at the main worldwide markets.
Samyang went through all this some time ago, that's why Mitakon can't go for an 85mm f/1.4 or a 135mm f/2. They need to attract attention with something more extreme.
Profits (if any) are made selling very cheap basic lenses, that perform amazingly well considering the price, but won't attract any attention or increase the perceived value of the brand.
I wouldn't be surprised if Mitakon was the maker behind products sold under other names, for example booster converters.
The moment is not very propitious, but I think Mitakon will eventually follow the Samyang way, in due time.

Cheers

Paolo
Forum: General Talk 2 Days Ago  
Your latest acquisition
Posted By cyberjunkie
Replies: 10,936
Views: 745,635
Wow, I miss No.1, but all the others correspond to last week's (or sligthly older) purchases.
Already got the Yongnuo (great for its price!) and the Eneloops for my wife. The off-camera cord has just been mailed.
I found two kinds of cheap P-TTL compatible cords, one I think is like yours, available under different names (or no name at all), and another one that looked nicely made but was available only from a polish seller. I chose to buy the cheapest one from China, cause it comes super fast and I never pay import taxes.

Regarding battery grips, I already own a Pentax and a third party one for other cameras.
The K-1 is the first Pentax camera that offers no choice. A cheap chinese knock-off was never released, and very likely never will.
Not an encouraging signal, isn't it? :(

Cheers

Paolo
Forum: Pentax SLR Lens Discussion 2 Days Ago  
Old lenses and modern senstivities
Posted By cyberjunkie
Replies: 16
Views: 1,120
@pinholecam
Hats off!
First because of the pictures, which show what can be done with a very old single coated glass, roughly contemporary to the CZJ Tessars shown in the previous post.
Second, because of your words. I fully concur with your statements.
In this new era of easy access to a wealth of global informations, we are drowned by a rising tide of "numbers", bits and pieces of informations, but we often miss the sense, we lack understanding.
We have informations but we don't really "know".
Cause often all those bits and pieces are not made really relevant by the integration with our own real life experience.

Cheers

Paolo
Forum: Pentax SLR Lens Discussion 3 Days Ago  
Recommended 'Cheap' 200mm or 300mm High Quality MF Lens
Posted By cyberjunkie
Replies: 42
Views: 1,348
Yes, it's true. Almost all suffer from this problem, but it's not always noticeable, and in general it is less of a problem than LaCA.
Some very sharp vintage 200mm show an overwhelming amount of fringing, like the CZJ Sonnar 2.8/200mm in M42 mount.
With a K-01 it was close to unusable wide open, I'm curious to try it on my K-1.
The 2.8/180mm in Pentacon Six mount is not as sharp, but doesn't suffer from tons of LaCA!

It's a pity that fast and cheap very rarely go together.
I like very much some ISCO lenses, and I love the 2.8/180mm. Unfortunately it's rare and quite expensive.
I found on Ebay its slower brother, apparently in rather good conditions, for just 49 + shipment. It is f/4 though, I think the OP was looking for something faster.
I had the crazy idea to buy it, but I already have an identical one...

Cheers

Paolo
Forum: Pentax News and Rumors 3 Days Ago  
Mitakon Speedmaster 135/1.4 now for Pentax?
Posted By cyberjunkie
Replies: 29
Views: 1,967
Well, it's f/1.8 :) :)
It's one of the A Star lenses I didn't buy when the price was not so crazy (along with the 200mm Macro), and that probably I will never own...
I think there is still a use for such fast lenses, even for the f/1.4 Chinese monster, it's just different than in film times.
Those looking for strong separation between planes and indistinct, creamy background would still profit from this kind of objectives, even if the sensor delivers very good high-ISO performance.
I've used with satisfaction one of my two old f/1.8 135mm lenses, and I'm even more satisfied by the quality of a Tokina-made Soligor C/D 2/135mm.
I guess I would be thrilled by the performance of your A Star... but we can't have everything in life :)
I will keep my eyes open for a second hand Samyang 2/135mm (which, sharpness wise, should trump the A*) or a Laowa 105mm Smooth Trans Focus. Both would be a great addiction to my "portrait lens" line-up.
I used the words "sharpness wise" instead of a less specific quality like "better". I'm quite sure the Samyang would be sharper at the same aperture, but I'm not sure at all it would be generically better. The more I use fast vintage lenses and I enjoy their qualities, the more I understand that the value of a lens is given more by something very subjective like its overall rendition, than by "numbers".
I value "3D pop" and OOF rendition more than absolute sharpness, and I've been very impressed by what the subjects of my portraits care for, and what they don't even notice.
Sometimes I might pixel peep on screen at 100% magnification, or look at a print through a loupe, but those with no technical awareness go straight for the picture with the smoother, creamier background, if the subject/s look more or less the same.

Given the ironic comments I often read about super fast lenses, I can give myself only two answers.
The first is that some photographers might have different tastes and priorities.
The second is that a few of them could be just commenting "in theory", basing their opinions on "numbers", and maybe some of them have never shot pictures with such beasts, let alone having the time and the technical background to know a lens, get around its shortcomings, and find what it can give if properly used.
Sometimes what looks like plain old common sense proves to be highly contentious, in the real world.

Cheers

Paolo
Forum: Pentax SLR Lens Discussion 4 Days Ago  
Removing fungus from Pentax-FA f4,7-5,8 100-300mm "silver"
Posted By cyberjunkie
Replies: 2
Views: 256
Bought this lens after trying its shorter sibling (FA silver 35-80mm).
It came with tho evident fungus spots, in the middle of a glass hopefully located inside the front assembly.
I don't have my tools with me, no good screwdrivers, no spanners, etc etc, so i have to postpone, though i'd like to know in advance if the glass elements in front of the diaphragm can be easily dismantled and cleaned.
If the elements are held in place by retaining rings and can be accessed from the front, i will bring the lens with me when i have to go back home, and i will try to do the work myself. If not, i might keep the lens as is and use it when i'm afraid a more valuable objective could get damaged.
From what i've seen, if i avoid flare shading the front glass, IQ is quite good, much better than expected :)

cheers

Paolo
Forum: Pentax SLR Lens Discussion 4 Days Ago  
The Bokeh Club
Posted By cyberjunkie
Replies: 10,422
Views: 1,025,593
I'm testing a nice Pentax-FA f4,7-5,8 100-300mm silver version. Bought it after being surprised by the performance of its shorter brother (35-80mm f/4-5.6).
Plasticky feeling, wobbly build, plastic mounts, but both very good for the price (very cheap).
The 100-300mm isn't great wide open, but it performs very well stopped down to f/8.
Here is a shot of a red hibiscus flower, first with the 100-300 at f/8 135mm, then with the Elmarit M at f/2.8.
Both pics were adjusted in Lightroom, so the color rendition of the two images is not an accurate indication of the difference between the two lenses.
The bokeh looks different, but one lens was stopped down, while the other was used wide open.
Focusing distance and focal are very close, though.

K_1_3607 by spaulein, on Flickr

K_1_3612 by spaulein, on Flickr

I like the rendition of the Leitz Canada Elmarit M 135mm, but the plasticky zoom at f/8 beats such a noble, expensive lens by a considerable margin, in both resolution and contrast.
Of course there are three stops of difference, and such result doesn't come unexpected, but my point here is that a well designed AF (consumer!) zoom from film times can still be quite satisfying, if used at its sweet spot (medium aperture and avoiding the extremes of the focal range).
In this case it is even more surprising because the lens came with two very evident fungus spots on the inside of the front group, right in the middle of the glass. No lens hood either, but i see no veiling/flare.

cheers

Paolo
Forum: Pentax SLR Lens Discussion 4 Days Ago  
Old lenses and modern senstivities
Posted By cyberjunkie
Replies: 16
Views: 1,120
Yes, it's tiny, and looks a bit weird on the K-1 :)
Yours is practically the same version of the Tessar I converted. The back of the lens is also looking similar.
The Altix mount is the breech-lock version of the Exa mount. Mine can be focused to infinity without problems, while the Exa/Exakta mount conversion needs some work to adjust for infinity.

I have the little Tessar cause I acquired an Altix camera for its 50mm Trioplan, and it came with a second "normal".
I used it to practice with the conversion procedure before doing the (more valuable) Trioplan 2.9/50mm, which also looks very similar to your lens from a certain distance.
It's really incredible how good these > 100 years old designs can perform, even on high res digital sensors. The rather primitive single coating calls for proper lens shading, but bokeh (Trioplan) and sharpness (Tessar) are there. The pictures are either quite good, or very poor, depending on the kind of lighting.
Sometimes the results are really special, I love that vintage look! :)

Cheers

Paolo
Forum: Pentax SLR Lens Discussion 5 Days Ago  
Old lenses and modern senstivities
Posted By cyberjunkie
Replies: 16
Views: 1,120
Mine is the Voigtlander version, which should be very similar, if not identical. I might be wrong, maybe it's not the lens i think it is...
My example has the "auto" pin, but no A/M switch, so the only way to use the diaphragm is to block the pin in depressed position.
I did it with some glue, but the spring was too strong, so i glued on top of the pin a little square of black matte tape.
Now it works fine, but i've tried it only on APS.C

cheers

Paolo
Forum: Pentax SLR Lens Discussion 5 Days Ago  
mold? in old takumar lens case
Posted By cyberjunkie
Replies: 11
Views: 404
A cheap DIY solution is spraying it with an anti-mold liquid, then let it dry under the sun till it's completely dry.
I live in Thailand, and the last exceptionally strong rainy season has brought a widespread mold infestation (also affecting two lenses). Light (UV), low humidity, high or low ph (baking soda or bleach) are all enemies of fungi.
The anti-mold liquid can be made with 3 spoons of baking soda, 3 spoons of salt, and 3 spoons of hydrogen peroxide, diluted in 1 liter of water.
It leaves almost no traces after it dries.
A 5% solution of hydrogen peroxide can be used to clean a fungal infection from optics. You don't have to wipe, just leave the glass element a few seconds inside the liquid, fungus traces will disappear almost instantly :)

Cheers

Paolo
Forum: Pentax SLR Lens Discussion 6 Days Ago  
Old lenses and modern senstivities
Posted By cyberjunkie
Replies: 16
Views: 1,120
Is the Tessar adapted from Exakta or Altix mount?
I have a very similar one I adapted to PK from Altix bayonet.
I did the same with the Trioplan 2.9/50mm, and I still have to convert the other two Meyer's for Altix (35mm and 90mm).

I will check your photos taken with the Planar. I have the Voigtlander twin (Color Ultron), but I still have to try it on full frame...

Cheers

Paolo
Forum: Pentax SLR Lens Discussion 6 Days Ago  
Soligor MC 300mm F4.5
Posted By cyberjunkie
Replies: 11
Views: 475
Try with a decent UV filter.
I'm sure you can find a used one of the right size on Ebay.
With some lenses/sensors the difference is quite impressive. I've seen examples online where the influence of a simple UV filter on lateral CA was almost miraculous :)
You never know until you try...

Cheers

Paolo
Forum: Pentax SLR Lens Discussion 11-11-2017, 09:54 AM  
The Bokeh Club
Posted By cyberjunkie
Replies: 10,422
Views: 1,025,593
Leitz Canada Elmarit M 2.8/135mm on the same leitaxed Viso focusing helicoid i use with the Summicron 2/90mm.
Unfortunately with a 135mm the minimum focusing distance is not so satisfying...
Same flowers i shot with the Soligor C/D 2/135mm:

Flowers with Elmarit 1 by spaulein, on Flickr

Other flowers, close to min focusing:

Flowers with Elmarit 2 by spaulein, on Flickr

Both shots were taken wide open, and have no PP. I left alone exposure, contrast, levels, etc. etc. Just cropped, and resized converting to jpg.

From the first tests i see a nice bokeh, lots of "pop", no visible lateral CA. A hint of longitudinal CA, though.
All in all, a very good lens, worth its acquisition. A pity the Visoflex helicoid doesn't allow for a decent min. focusing distance.


cheers

Paolo
Forum: Pentax SLR Lens Discussion 11-10-2017, 06:54 PM  
XR Rikenon 28mm f3.5 Aspherical Pancake
Posted By cyberjunkie
Replies: 2
Views: 1,192
In the meantime I've seen no other references to this (not so common) lens.
No reviews. No informations about the actual maker. AFAIK Ricoh switched from Pentax to Sigma well before the release of these two "pancake" lenses, but I don't know of any 3.5/28mm with aspherical element made by any 3rd party maker in the nineties...
An old post suggested Pentax design. Seems strange, as the closest Pentax project would be the FA 28mm, which also had an aspherical element if I'm not mistaken, though that was f/2.8 instead of f/3.5.
I've seen a few on Ebay, regularly at outrageous prices, given that's a fully manual lens with unimpressive plastic construction.
Does anybody own one. How is it?

Cheers

Paolo
Forum: Pentax SLR Lens Discussion 11-10-2017, 08:42 AM  
What is the most compact/light Pentax zoom lenses?
Posted By cyberjunkie
Replies: 21
Views: 833
I don't always fully agree with Norman's (sometimes a bit pointy :) ) opinions, but I share his appreciation for the late silver Pentax-FA 35-80mm zoom (and for the Pentax-F 70-210mm).
The 35-80 is plasticky, a bit wobbly, but is very light and works surprisingly well at medium diaphragms.
It's a good fit for the K-01.

If you don't mind going for the green button procedure, there are cheaper alternatives to the 40mm Limited and its siblings.
One is the old Pentax-M, then there are two more (both probably made by Cosina), one 2.8/45mm and one 2.5/40. I own them as Revuenon (the former) and Porst (the latter).
The differences shouldn't be so great.

Cheers

Paolo
Forum: Pentax SLR Lens Discussion 11-09-2017, 08:59 AM  
The Bokeh Club
Posted By cyberjunkie
Replies: 10,422
Views: 1,025,593
I tried the Porst/Cosina 1.2/55mm in my preferred photographic environment: night scenes with artificial lights.
Can't say it's the best lens for this use, it suffers a lot from flare. Evidently the coating is not on par with the SMC of the Pentax-K 1.2/50mm and also the Revuenon/Tomioka 1.2/55mm.

When there are not many light in the frame (or just outside it), and the subject in focus is shaded enough, this is what you get:

Loi Krathong 2017_2 by spaulein, on Flickr

When there are a lot of surrounding lights, even if there i just one bulb in the scene, the contrast and the perceived sharpness degrade a lot:

Loi Krathong 2017_3 by spaulein, on Flickr

When there are a lot of lights, it's a mess (but in this case there is the problem of very thing DOF, all shots are wide open!):

Loi Krathong 2017_5 by spaulein, on Flickr

This is the rendering of the FA 1.8/77mm Limited wide open, in the same situation:

Loi Krathong 2017_4 by spaulein, on Flickr

Even with some contrast bumping and unsharpen mask, the Porst shows its limits in this kind of shooting conditions.
It could be my sample, but i don't see haze or any physical damage.
In daylight, with a decent hood, my Porst performs much better, but it's definitely a kind of soft focus lens wide open...
All in all, any 50mm-ish f/1.2 is pure fun, but i give my preference to the Revue, immediately followed by the Pentax.

cheers

Paolo
Forum: Pentax SLR Lens Discussion 11-07-2017, 09:33 AM  
Full-frame lens on a crop body not advisable?
Posted By cyberjunkie
Replies: 168
Views: 4,506
I don't have a degree in optics, but I know that the laws of optics are always valid, in astronomy as well as in photography.
Aperture is a number that expresses the ratio between the focal length of a lens and the diameter of the entrance pupil of the same lens. It affects both exposure and depth of field, as we all know.
While the concept of "equivalent focal" can make sense, "equivalent aperture" is in my opinion the wrong way to explain something real, and we create a lot of confusion if we mix the two things together, as if they were the same.

Cheers

Paolo
Forum: Pentax SLR Lens Discussion 11-07-2017, 02:38 AM  
Full-frame lens on a crop body not advisable?
Posted By cyberjunkie
Replies: 168
Views: 4,506
And the Dagor, no funky whirlwind thingy... but it dominated an era, original or cloned, along with the Zeiss Tessar.
Still today, in a controlled studio environment, I'm sure that a first generation Dagor-type Symmar could positively surprise. Of course its MC grandchildren are better, but with appropriate lighting the difference shouldn't be so huge

Cheers

Paolo
Forum: Pentax SLR Lens Discussion 11-07-2017, 02:11 AM  
Pentax DA 35mm f/2.4 on a k1?
Posted By cyberjunkie
Replies: 28
Views: 972
It depends on which Adaptall-2 ring is mounted. If it's M42 you can use it the way @normhead has suggested. If it's a PK adapter you can go the "green button" way (plenty of references on this forum). If you have a P/KA adapter leave the diaphragm ring on A and use any exposure mode you like.
Both the Tamron Adaptall-2 24mm and 28mm are still very usable, and should work more than fine at medium diaphragms. I suggest to buy a P/KA adapter if you find a decently priced one.
All Adaptall-2 lenses you may acquire in the future would work as Pentax-A objectives (well, almost).
The only weak spot is the BBAR multicoating. Contemporary T* and SMC were much better!
With wide angles flare can be problematic.
Almost contemporary 17mm and 2.5/180mm "Anniversary", two lenses I routinely use, are very different under this point of view. The latter gives very little flare problems, while the former is a pain to use in low light, with artificial light sources within, or just outside the frame.
The Bower/Samyang 14mm, albeit wider, needs less care in the composition of the picture. Btw, apart from geometric distortion, it works just fine on my K-1. There are even Lightroom correction profiles, if needed...

Cheers

Paolo
Forum: Pentax SLR Lens Discussion 11-07-2017, 12:03 AM  
Full-frame lens on a crop body not advisable?
Posted By cyberjunkie
Replies: 168
Views: 4,506
Finally I found a post that highlights the same points I had in mind. This will spare me cramps, typing on the virtual keyboard of my cellphone :)

Just two more details:
1) most FF optics available in PK mount are film-era lenses; their design, not their image circle, is the problem (especially true for zooms and super wides)
2) a good multicoating on the back glass and appropriate baffles on both camera and lens bodies should tame the non-image-forming light rays coming from an FF optic. Of course a suitable lens hood is the first step. Though I've seen vintage film lenses with poor blackening, and adapters that are a total disaster in this regard.
A typical example would be a macro lens for Pentax 6x7, Pentax 645 or Mamiya 645. All of them are still sharp enough (the 6x7 one a little less, IMHO), but the adapter is the weak link. Chinese rings are generally good and cheap, but sometimes need to be closely inspected for light leaks and reflections (shiny, non blackened material).
With some M42 lenses any adapter ring, even the original Pentax, lets plenty of light in. My remedy is an O-ring of appropriate size, or a black hair band.
Many times I found that a supposedly poor lens was plagued by light leaks or inter-reflections. Once the problem was solved the same lens proved much better! :)

The area of the APS-C sensor doesn't differ so much from the FF/135mm, I don't think it would justify going for different levels of sharpness, at the design level. I don't think modern day FF lenses, of any maker, are designed to be less sharp than APS-C optics. Though the larger the format they are designed for, the more light enters the camera. Proper construction and appropriate lens hoods are paramount.

EDIT:
The last message, posted by @Digitalis, reminded me that sometimes 8x10" optics could give a certain level of veiling flare, if used on 4x5" or film backs. Even a black pleated bellows can cause inter-reflections, if the material is not fully matte.
I'm sure modern time Sinar or Linhof cameras have addressed the problem (and recent LF lenses are multicoated!), but I own a few vintage cameras that have the bellows made of a kind of shiny black material, and some areas that should be blackened, unfortunately are not. On such cameras it's better to use lenses with appropriate coverage, and it's always a good idea to use the kind of adaptable lens shades used in cinema, instead of a conventional screw-in hood.

Cheers

Paolo
Forum: Pentax SLR Lens Discussion 11-06-2017, 08:10 AM  
The Bokeh Club
Posted By cyberjunkie
Replies: 10,422
Views: 1,025,593
Spending plenty of money on a Pentax-A Star 1.8/135mm would have been my favorite choice, but it has always been out of my budget...
This is my most loved fast 135mm:
Soligor (Tokina made) C/D f/2 135mm

Two shots wide open. Great bokeh, and sufficient sharpness, at least for my needs.
Clicking the images takes to the Flickr pics, resized to 40% from the original raw's.

Thai wild flowers 2 by spaulein, on Flickr

Thai wild flowers 1 by spaulein, on Flickr

The photos are nothing special, but they give an idea of what kind of creamy bokeh this kind of lenses can deliver

cheers

Paolo
Forum: General Talk 11-06-2017, 01:22 AM  
Your latest acquisition
Posted By cyberjunkie
Replies: 10,936
Views: 745,635
Not a big inconvenience :)
It's just a hollow tube that goes in between the lens body and the Adaptall-2 ring.
With a PK adapter it's much better to use an extension tube (or even better grab a set... cheap and practical).
I don't know how it does behave with the PKA version of the adapter, with electric contact. I'm curious about that, does anybody have a first hand experience?
Even if it doesn't misbehave (read: it behaves like with no extension ring), I would not mess too much with the PKA adapter. They are finicky...
Unfortunately extension tubes with electric contacts are not so common, and not dirty cheap like the all-mechanical ones.
Maybe some Chinese company makes them. I'd happily buy a set if I find a cheap one on the Bay.
I still own two versions of this same lens, the 52BB and a later one in PKAF mount but with the same optics (52E). Long ago I also owned the first version (52B).
I find the optical project to be great, after such long time it's still competitive with current macros in the same focal range.
The only problem is the in/famous light spot that sometimes shows up, due to inter-reflection between the back glass and the sensor cover. Though I never saw it using the K-1, not a single time... but I didn't use it very much, so I'm not jumping to conclusions.
I can say that the results were great, and that for the price it's one of the best film-era lenses on digital full frame.
You'll like it!

Cheers

Paolo
Forum: Pentax SLR Lens Discussion 11-06-2017, 12:41 AM  
Soligor MC 300mm F4.5
Posted By cyberjunkie
Replies: 11
Views: 475
Here it is, mostly based on the list on mf lenses forum, and updated/integrated with my own findings, based on actual comparative examination of the OEM version.
Of course most of the merit goes to the original author of the list, who did a great, great work that has proven very useful to those interested in Soligor lenses, including myself.

I found that the level of interdependence of Japanese lens makers was quite strong, compared for example with the German brands that were still active during the sixties/early seventies. For example Soligor branded (preset) long teles, made by Tokina, Komine or Kino used the same hardware, for example tripod collars.
Contrary to german companies, there are few records available, and the Japanese mentality (and also the language barrier!) didn't help collector and historians to write something akin to the monograph booklets published about Germany/UK/France lens makers. There are little informations about Japanese independent optical companies, while there is a lot about the main camera makers. A real pity, the production of the independent brands (and their relationships) have seen very little interest, and the industrial/engineering interdependence between important makers like for example Tomioka and Cosina, although quite evident, will probably remain undocumented.

Cheers

Paolo


Forum: Pentax SLR Lens Discussion 11-05-2017, 06:33 AM  
Soligor MC 300mm F4.5
Posted By cyberjunkie
Replies: 11
Views: 475
Nice find. Never seen one, but I own many Soligor long tele lenses, mainly preset, up to 800mm focal length! :)
I'm not a "proper collector", though I have a special interest in Soligor lenses, especially early ones.
According to my notes, your lens should have been made by Sun on 1978.
Sun zooms from the seventies are forgettable, though some primes are surprisingly good (like a silver 2.8/135mm marked Porst).
Try yours and report your impressions. A side picture would be welcomed, I'm interested in the style of the barrel.

@MarcusBMG
Thanks for the interesting Flickr link.
I've checked the pics on my cellphone, no pixel peep... though the results seem much better than average. I've been impressed by the last two photos, the use of a UV filter almost eliminates fringing!

EDIT:
I compiled a list of Soligor serials by maker, starting from one I found on the Manual Focus Lenses Forum, and adding all my personal findings.
I found that the initial number refers to different lens makers, depending on the length of the serial.
If anybody is interested I can post it

Cheers

Paolo
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