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Forum: Pentax Film SLR Discussion 11-11-2017, 11:58 AM  
newbie...Please help finding lens for k1000 slr!
Posted By LesDMess
Replies: 39
Views: 1,609
A casual test I did of my 50mm lenses - including the 40mm and a 500mm mirror lens, using my K20D shows no significant optical advantages/disadvantages among the Pentax lenses as they are all limited by the 14.6MP sensor. I would consider the mirror lens to be optically challenged.


Full res version -> Pentax Lenses 01

You can see how limiting the 14.6MP sensor results are when you compare to scanned film.

Full res version -> Pentax SMC Macro 50mm f4 serie

And of course you can see from the optical enlargement in the far right how much more detail was captured on film using this lens that could not be resolved by my 4000dpi Coolscan scanner.

I have tested my Pentax prime lenses on film and I didn't find any that was significantly better or worse when it comes to resolving detail. As I said, I've bought all my manual focus prime lenses from the used market - condition unknown and cheap, so perhaps I've just been really lucky?
Forum: Pentax Film SLR Discussion 11-11-2017, 08:26 AM  
newbie...Please help finding lens for k1000 slr!
Posted By LesDMess
Replies: 39
Views: 1,609
I take the reviews here for what they are - more as user perspectives/opinions, as opposed to technically accurate. Since the gear is now many years older and generally picked up used in who knows what condition, one review may claim a total disaster while another may have an immaculate sample.

It seems to me the M40/2.8 is considered "too expensive" and takes a little getting used to as opposed to being so optically bad unless of course the sample was damaged.
Forum: Pentax Film SLR Discussion 11-10-2017, 06:10 AM  
another one bites the dust
Posted By LesDMess
Replies: 36
Views: 1,532
Had an EOS3 once.





It turns out that all Canons with aperture priority will max out at 30 second so I explored all other brands and models and found that the LX was the only one that would keep it's shutter open for as long as it takes. Additionally, Pentax clearly based its design on the original AP.



With today's ultra wide latitude films, I really enjoy using this fully functional non metered camera!
Forum: Pentax Film SLR Discussion 11-09-2017, 07:35 PM  
newbie...Please help finding lens for k1000 slr!
Posted By LesDMess
Replies: 39
Views: 1,609
Too bad as I was so looking forward to seeing evidence of significantly better IQ . . . :p
Forum: Pentax Film SLR Discussion 11-08-2017, 08:57 PM  
another one bites the dust
Posted By LesDMess
Replies: 36
Views: 1,532
What was wrong with them?
Forum: Pentax Film SLR Discussion 11-06-2017, 06:09 PM  
Asahi Pentar K - Value? (Yes, PentaR)
Posted By LesDMess
Replies: 19
Views: 866
Very rare find indeed! That is, until you compare it to a black version . . . :cool:


Not mine but from the ASAHI OPTICAL HISTORICAL CLUB

You didn't say if the other one that sold for a $1000 was complete with lens and case which I am sure ups the price some more.
Forum: Pentax Film SLR Discussion 11-05-2017, 09:11 AM  
newbie...Please help finding lens for k1000 slr!
Posted By LesDMess
Replies: 39
Views: 1,609
I sure would like to see evidence of that significantly better IQ when you get a chance to post it.
Forum: Non-Pentax Cameras: Canon, Nikon, etc. 11-04-2017, 10:43 AM  
The HALF-FRAME-35mm Club
Posted By LesDMess
Replies: 20
Views: 1,117
Ok I found the Olympus Pen site was I posted about -> Olympus Pen Cameras. The various lens adapters are in the SLR Pens, Lenses & Adapters section which includes one for Canon, Exacta, Leica, Nikon, OM series, M42, Minolta and even the Pentax K mount.

The Sub Club is another website that has a list of half frames - as well as the various subminiature format cameras and others.

I shot with 110 format film for a long time and finally got a chance to scan them using my Coolscan. It was tedious but it only takes tens of seconds to actually perform the scan. I was surprised what I got out of plastic lens toy cameras. On this image, I superimposed the various film formats I have used - 110, half frame 35mm, full frame 35mm and medium format 6X7 using different film types.

Forum: Pentax Film SLR Discussion 10-30-2017, 08:21 PM  
Analog Film versus Digital Photography
Posted By LesDMess
Replies: 66
Views: 2,753
Steve, I am always happy to share and learn just like everyone. Even though I make sure I have my facts straight, I am always willing to listen to anything constructive.

First I shot a series on Techpan and scrutinized with my 50X microscope the best of the lot. I then used the same frame for scanning/copying.

I rented a D800 and tested to see if I can attain the same results as DPREVIEW of Nikon D800 using my Nikon 55mm F2.8 macro. Since I matched what they showed, I know everything is up to snuff. I then used the D800+Nikon 55mm F2.8 macro+PB-4+PS-4 autobellows to copy the full frame of Kodak Techpan. I tried numerous apertures and micro focusing adjustments to attain the best results I could get. Given that DPREVIEW attained about a 36 1 in their test and I attained (8 X 4) 32 1/5 - from a copy on film vs the original test target, that seems right. That it can attain this relatively high mark means the source (test target on Techpan) had to contain more detail.

Using my Pentax K20D+50mm f4 macro+autobellows+slidecopier, I optically magnified the center portion of interest about 4.5X to show that indeed the frame of Techpan had in fact more unresolved detail at (11.5 X 4) 46 1 then the Nikon D800 at 32 1/5.

I am very interested in trying the D850 and not just for the 45MP sensor but also to see how the built-in negative copy conversion works.
Forum: Non-Pentax Cameras: Canon, Nikon, etc. 10-29-2017, 08:26 PM  
The HALF-FRAME-35mm Club
Posted By LesDMess
Replies: 20
Views: 1,117
I have a couple of half frame cameras too - Konica Auto-Reflex and Olympus Pen FT.



Unfortunately I don't have a collection of lenses for either but I do have an OLYMPUS-PEN F MOUNT ADAPTOR N which allows me to use my Nikon lenses and autobellows with the Pen.



I am not bothered by the small half frame size given that I was using 110 film on plastic cameras for a long time. But with today's exceptional films and the use of a Coolscan, I can get plenty of detail on a half frame shot.

This one shot with the Pen using the Nikon autobellows + macro lens on Kodak TMAX100 processed in XTOL.


Full res version -> Kodak TMAX 100-14-34

I believe the Olympus Pen F series was first to offer various adapters for practically all the lens mounts available back then. I had a link to a site that showed them all. If I can find it I will post it unless someone else knows.
Forum: Pentax Film SLR Discussion 10-29-2017, 05:31 PM  
Analog Film versus Digital Photography
Posted By LesDMess
Replies: 66
Views: 2,753
It's great that you found the MP testing links. It doesn't say how many copies of each lens they tested. Maybe more than one or assume that each is as good as the other?

Although I proved from my results using Kodak Techpan - with my copy of Pentax-M SMC 50mm f4 macro lens, that it does outresolve even the latest sensors on film - satisfying the OP's question, I did not show the results from the lenses on the OP's list. I do have the Pentax-M 50mm F1.4 and I am sure I also tested it in the same manner. Now it's just a matter of getting it.

Of course all I have are used lenses so I am not sure just how close it is to it's original performance.
Forum: Pentax Film SLR Discussion 10-29-2017, 12:38 PM  
Lenses to take to Paris
Posted By LesDMess
Replies: 25
Views: 1,261
It is amazing how those huge tour busses were able to navigate those tight busy streets!

Good luck with your trip!
Forum: Pentax Film SLR Discussion 10-28-2017, 03:30 PM  
Fujifilm sadness...
Posted By LesDMess
Replies: 18
Views: 1,270
I didn't get to test it thoroughly but I found E100G had good latitude and color characteristics though not be as high resolving as Fuji Velvia or Kodak E100VS. I liked it better than Fuji Astia.
Forum: Pentax Film SLR Discussion 10-28-2017, 10:11 AM  
Fujifilm sadness...
Posted By LesDMess
Replies: 18
Views: 1,270
Haven't tried any Ferrania film yet and more options is always better!
Forum: Pentax Film SLR Discussion 10-28-2017, 09:08 AM  
Fujifilm sadness...
Posted By LesDMess
Replies: 18
Views: 1,270
Sadly I am old enough to know that another's conflicting opinion doesn't negate my own. If it helps clearly Fujis chrome offerings are lasting far longer then others that have been on the market which speaks volumes for it's acceptance. However, with Kodak's possible reintroduction of their E100 slides, we may have another player in the market.
Forum: Pentax Film SLR Discussion 10-27-2017, 08:37 PM  
Analog Film versus Digital Photography
Posted By LesDMess
Replies: 66
Views: 2,753
Maybe he meant that as far as Nikkor glass was concerned . . . ;)

My last rolls of Kodachrome were the 25 speed but I never got to test it properly. However, I tested some of my lenses using Kodak Techpan @ ISO 25 and processed in Kodak Technidol and clearly the results indicate far more resolution then a 36.3MP.

In this test, I used a Pentax M 50mm f4 macro lens on my Pentax LX to take a shot of a 4 X 4 arrangement of 12233 res charts under optimal conditions. I then "scanned" the whole frame of film using my Pentax K20D+macro+autobellows, Nikon D800+macro+autobellows and Coolscan 9000 and show the 100% crops from each on the left hand side. The D800 and Coolscan results are very close even though the D800 has more pixels then a 4000dpi scan. However, to the right I used my K20D+macro+autobellows to capture about a 4.5X optical magnification of the center area and it is plain to see there is far more real detail captured on the frame of Techpan that has not been resolved by these methods.


Full res version -> Kodak Techpan 04-27 scan compare

And looking at DPREVIEW's results from the D850, it certainly looks like it is still not resolving the detail captured on Techpan. And this is using a lens I bought off a local craigslist for cheap so I am not sure if this lens is still in optimal condition. In fact I am not sure what is the limiting factor here - lens, film, manual focusing or a combination of these factors.

In any case, this lens - as well as the others I have tested that are all used, are not going to be the limiting factor in attaining all the detail of a scene.

---------- Post added 10-27-17 at 11:39 PM ----------



Beautifully done!

---------- Post added 10-28-17 at 12:17 AM ----------



This is a lens I have that I also tested and would appreciate comparing your results with mine.
BTW, did you test your lens with other f1.2 lenses?
Forum: Film Processing, Scanning, and Darkroom 10-24-2017, 06:28 PM  
Old 35mm Trannies
Posted By LesDMess
Replies: 8
Views: 775
What version Nikonscan and are you running it under older Windows version compatible with Nikon's driver?
Forum: Pentax Film SLR Discussion 10-23-2017, 05:39 PM  
Lenses to take to Paris
Posted By LesDMess
Replies: 25
Views: 1,261
That is quite the detailed review there!
The auction past said it was 40's which I didn't think so and now I know better!
Forum: Pentax Film SLR Discussion 10-23-2017, 10:29 AM  
Lenses to take to Paris
Posted By LesDMess
Replies: 25
Views: 1,261
Thanks for that bit of info!
Forum: Pentax Film SLR Discussion 10-23-2017, 09:04 AM  
Lenses to take to Paris
Posted By LesDMess
Replies: 25
Views: 1,261
Shot of the Arc de Triomphe I took on Kodak Gold early 2000.



A crop from a 4X5 transparency I won off ebay era 1950's/1960's?



No doubt that shot must have been taken a few times!
Forum: Pentax Film SLR Discussion 10-22-2017, 11:32 PM  
Lenses to take to Paris
Posted By LesDMess
Replies: 25
Views: 1,261
You can't even tell the vignetting on a film body!
Forum: Pentax Film SLR Discussion 10-22-2017, 03:15 PM  
Lenses to take to Paris
Posted By LesDMess
Replies: 25
Views: 1,261
Years before the technology was available, I used three frames on Kodak Gold to capture the 28 kings on Notre Dame. Later on, I used MS ICE to stitch them together.



Take a wide, standard and tele since K mount manual lenses are quite small and light.
It will be hard to resist the urge to shoot everything so save some for the next trip!
Forum: Pentax Film SLR Discussion 10-16-2017, 05:11 PM  
Upgrading from K1000
Posted By LesDMess
Replies: 24
Views: 1,219
When Nikon introduced the F3, they even said that the LCD was going to fail in a relatively short time and made it easy to replace in anticipation of it. Here we are >30 years later and mine is still perfect and so is the XR-7. So, I am not really sure how the failure happens but so far so good.
Forum: Pentax Film SLR Discussion 10-10-2017, 05:11 PM  
Upgrading from K1000
Posted By LesDMess
Replies: 24
Views: 1,219
Upgrade, smaller and lighter, mention ME Super and Super Program . . .

All of these are smaller and lighter except for the LX which is smaller but maybe about the same weight depending on which version of K1000 and which version viewfinder on the LX.



The MX is an upgrade as far as metering cel, largest viewfinder among all (regardless of brand) fixed prism manual SLRs and has motor and film back options.

The ME Super has aperture priority.

The Ricoh XR7 has aperture priority and conventional control layout. Here is an ad for it.



The LX has TTL flash, aperture priority, interchangeable viewfinders and has sync to top shutter speed + bulb mode, available when batteries die.
Forum: Pentax Film SLR Discussion 10-03-2017, 11:57 AM  
:cool: Lets see those ''film'' shots
Posted By LesDMess
Replies: 16,200
Views: 1,880,306
How many scans so far?

Also, which of the three methids - Coolscan, Flextight and DSLR, provides the least work to get color/contrast right?
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