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Forum: Pentax DSLR Discussion 6 Hours Ago  
A simple tool for Pentax O-GPS (Astrotracer) Calibration more easy
Posted By kypfer
Replies: 2
Views: 364
My thoughts exactly! At the moment it just looks like some kind of frig to make the camera "think" it's calibrated.
Forum: Pentax SLR Lens Discussion 15 Hours Ago  
300 prime, DA* f4 or Sigma f2.8
Posted By kypfer
Replies: 10
Views: 399
Just my tuppence worth from experience with similar lenses ... even if the photographic result at f/2.8 aperture is considered "unusable", for whatever reason, having the extra stop of aperture wide open gives the autofocus a lot of help in low light and/or low contrast situations, also improves the options for a tele-converter, should the need arise ;)
Forum: Pentax DSLR Discussion 2 Days Ago  
K-New sensor? will it be 43mp?
Posted By kypfer
Replies: 18
Views: 1,068
43M-pixels would be groovy ... but I'd settle for 36M-pixels. A 50% increase from 24, like that from 16 to 24, would be worth having :)


What I would like, occasionally, are a couple of stops less sensitivity ... being able to dial in 25 or 50 ISO, rather than having to dig out and fit an ND filter, would be useful! Obviously, if they can further improve the noise at the very high sensitivities, that would be nice as well :)
Forum: Pentax DSLR Discussion 2 Days Ago  
Accidental Underexposure
Posted By kypfer
Replies: 14
Views: 457
I've made a similar mistake, on occasion. I've got so used to having the intelligent all-capable camera making all the decisions for me, I forget to double-check for any flashing warnings in the bottom of the viewfinder.


Might I guess, like me, you also wear spectacles, thereby further limiting your all-over view of the viewfinder?


Maybe a warning "beep" could be included in a firmware update ... or is it already there and I don't hear it 'cos I've got sounds switched off?
Forum: Pentax SLR Lens Discussion 6 Days Ago  
M42 adapter problems
Posted By kypfer
Replies: 15
Views: 492
The "flanged" adaptors, that don't allow infinity focus, don't have a spring latch, so no problem there. Once fitted they just click on and off the camera by using the lens release button on the camera :) Very convenient if being used in conjunction with a macro lens where infinity focus wouldn't normally be needed.


I had a "third-party" adaptor jam completely on one camera. I ended having to unscrew the mount from the body so's I could get at the back of it to jiggle it off! If you end up needing to do this, lay the camera body on it's back and keep it there whilst removing the lens mount very slowly and carefully, else all the little electrical pins and their associated springs jump out !! :( If I was ever tempted to use a third-party adaptor again I'd definitely remove the spring-latch first. Fortunately, I have two Pentax originals, so that scenario is unlikely to occur ;)
Forum: Pentax SLR Lens Discussion 6 Days Ago  
SDM to screwdrive conversion?
Posted By kypfer
Replies: 10
Views: 457
Not an issue I've had to deal with ... yet ;)


I'm fairly sure that these lenses are "either/or" so's they will work on earlier bodies that don't have the power contacts in the lens mount. The "problem" is that they default to SDM when fitted to a capable body and need to be "re-prioritised" so's they default to screw-drive.
Forum: Pentax SLR Lens Discussion 02-17-2020, 01:12 AM  
Help with First Vintage Lenses!
Posted By kypfer
Replies: 15
Views: 638
I use a bag-full of Fujinon 42-screw lenses, mostly left-overs from my film days.

In answer to the OP's questions, yes, the aperture pin needs to be held "depressed" if you want to be able to close the aperture. Don't grind it off, it needs to be held in to activate the aperture. On some lenses you can "get at" the "works" and fit a plastic collar on the pin inside the mount to keep the mechanism activated, this is reversible, on others it's far easier just to put a drop of super-glue on the pin and hold it in place 'till it sets, which is my preferred route. Do note, use an applicator such as the tip of a cocktail stick or thin screwdriver to apply a small single drop of adhesive, don't risk approaching the back of your lens with a whole bottle of glue which may just decide to choose that moment to dispense an excess ;) Do note, this procedure is not necessary on the Pentax (or any other M42 lens) which has an a/m switch.

Also, unless the Fujinon is an early model without the feature, there is an aperture-coupling lug on the rear of the aperture ring which needs to be ground/filed off if the lens is to be used on a Pentax DSLR and you wish to retain infinity focussing. If not, the lens won't screw completely flush with the body AND the aperture ring will jam against the body, preventing it's adjustment!

The Fujica adaptor is of no use to you on a Pentax. This particular model, the "XD", is adjustable and allowed one to use any auto-aperture 42-screw lens, not just Fujinons, in auto-aperture shutter-priority mode on the AX5 camera, possibly the only combination that allowed this functionality with the older lenses!

I'd recommend the acquisition of a genuine Pentax 42mm-PK adaptor if at all possible. Much better made than some after-market look-alikes which have been known to jam onto the camera body!
Forum: Pentax DSLR Discussion 02-16-2020, 02:27 AM  
digital filters
Posted By kypfer
Replies: 4
Views: 460
I too hardly ever use digital filters "in camera". I shoot almost invariably in jpg, but when/if there's an image I feel may "benefit" from some manipulation I press the appropriate on-camera button to save a RAW file as well. I can then fiddle with it in "Digital Camera Utility" when I get home. The supplied software may be a little sluggish and a little unintuitive, but it can apply all the "in-camera special effects", leaving me more time when I'm out to take pictures ;)
Forum: Pentax K-01 02-15-2020, 09:32 AM  
Voigtlander 21 mm Viewfinder
Posted By kypfer
Replies: 16
Views: 488
I use optical viewfinders on my APS-C DSLR's for infra-red work, pinhole photography and extreme ND-filter stuff. For a 20mm lens you'll need a 30mm viewfinder on APS-C, a 28mm will be close enough for most purposes.
If you're anticipating doing a lot of work like this, with various different lenses, one of the Russian "universal" viewfinders ACP - Universal can help a lot ;)

Mine is a "left-over" from my film days, I'm often quite pleased I hung on to it :)

Do note, an external viewfinder is great as a compositional aid, but you still need to establish focus, either using LiveView or good old-fashioned focussing scale on the lens. I've even been known to carry a separate external rangefinder!

Enjoy :)
Forum: Pentax SLR Lens Discussion 02-14-2020, 04:14 PM  
Meyer-Optik Gorlitz Trioplan 100mm f/2.8 II for K-mount and M42
Posted By kypfer
Replies: 18
Views: 762
I've yet to produce anything worth sharing with it, but initial experiments with my Carl Zeiss Jenar Triotar 135mm f/4 indicate that, under appropriate circumstances, quite reasonable "bubbles" can be generated. Many longer lenses have more than three elements, which does seem to be the criteria for "bubbles", though I'll admit the bokeh generated by the Zenitar looks "interesting" :)
Forum: Pentax KP 02-14-2020, 07:48 AM  
Delayed, noisy wake up
Posted By kypfer
Replies: 11
Views: 395
My KP does the "intermittent buzzy rattle" thing from switch-on intermittently ... to be honest, I've ignored it! It was only when it "buzzed" this morning when I switched it on in the hide that I remembered this thread.


I've stopped using the "Power-save" function simply because I found the "wake-up" time to be noticeably too long, on occasion, though I do keep the rear screen de-activated, so power consumption is minimal. I mention this simply to define that my experience only applies to a "switch-on from cold" scenario ... if you're experiencing it when "waking up" from power-save as well this might help to define the circumstances.
Forum: Pentax Film SLR Discussion 02-14-2020, 07:36 AM  
Film and Cold Temperature
Posted By kypfer
Replies: 13
Views: 492
If it's individual films, they'll be hermitically sealed, (plastic tubs or foil wrap), so unpack them, keep out what you want/need for immediate use then put the balance straight into the 'fridge/freezer, or, if you're going to use it all within the next six months, a "cool dry place" is all that is necessary for storage. Remember, film was "stored" on the shelf in retail outlets "back in the day", it's not overly sensitive, provided it's not actually "cooked".


Enjoy :)
Forum: Pentax SLR Lens Discussion 02-14-2020, 01:46 AM  
Meyer-Optik Gorlitz Trioplan 100mm f/2.8 II for K-mount and M42
Posted By kypfer
Replies: 18
Views: 762
It was ... re-branded Chinese lenses and all ... but the brand-name and the "Trioplan revival" concept has been bought up by a new group of "entrepreneurs", as yet it's all smoke and mirrors, as far as I'm aware!


T2-mount is a good idea, but extensively reduces the opportunity for profit ;)


FWIW I bought a very clean 50mm f/2.9 Trioplan "original", mounted on a very clean Exa body, just a couple of weeks ago on eBay for £30. The "asking prices" from the dreamers out there are significantly higher, but if using eBay as a guide, you need to filter the sold items by "Auction" to find the "real" market prices ;)


As written elsewhere, if anyone wants to experience the "triplet effect", aka "soap-bubble bokeh", a Domiplan or Meritar, even a re-mounted Reomar, will provide the effect at a "sensible" price ;)
Forum: Pentax SLR Lens Discussion 02-13-2020, 03:30 PM  
Meyer-Optik Gorlitz Trioplan 100mm f/2.8 II for K-mount and M42
Posted By kypfer
Replies: 18
Views: 762
According to the "manufacturer's" web-site Trioplan 100 f2.8 II | Meyer Optik Görlitz lenses - Tradition meets innovation "This product is currently not available" ... don't hold your breath ;)
Forum: Pentax DSLR Discussion 02-13-2020, 11:35 AM  
Adapter to fit 39mm Leica threaded lenses to Pentax K50
Posted By kypfer
Replies: 12
Views: 548
No, not at all!

The K-01 is effectively a K-mount Pentax DSLR without a mirror, so it has the same physical restrictions regarding the mounting of a lens, unless you want to get really adventurous and try poking the back of a collapsible Elmar or Industar into the body. I'll emphasise at this point I've not tried this, I don't know if there's sufficient clearance or if there's any possibility of doing any damage ... Not Recommended!!

Leica-type screw-fit lenses are designed to be used on a camera that is effectively 28.8mm "thick". Many (most?) modern mirrorless interchangeable-lens cameras are "thinner" than this, so a mechanical adaptor is not a problem. The Pentax K-mount however is effectively 45.46mm "thick" (as is M42-screw) so trying to fit any lens that was designed to be use on a "thinner" camera really is a non-starter!

Do note, none of this applies to the Russian SLR lenses designed for use with the Zenit 3m and similar cameras. These have a 39mm thread but are designed for use on a "thick" camera, coincidently of very similar "thickness" to a Pentax DSLR, so these can usually be adapted with no problem ;)
Forum: Pentax SLR Lens Discussion 02-13-2020, 01:29 AM  
Would you buy a PLM with damaged front element?
Posted By kypfer
Replies: 23
Views: 943
Any damage like this has the potential to cause loss of some contrast through flare, in adverse conditions.

Having said that, my Tamron 90-300mm has a scratch, several millimetres long, fairly central on the front element and I don't notice any problems under normal circumstances.

There is an "old trick" which involves filling small scratches like this with black paint. If the light can't get into the scratch, it can't get scattered ;)

As to the price, that's your call ;)
Forum: Pentax KP 02-12-2020, 10:52 AM  
What lenses do you use on your KP?
Posted By kypfer
Replies: 108
Views: 8,871
My KP was purchased last December as a superior platform for my Sigma 150-500mm and for that purpose it performs admirably. Probably over 90% of the (currently circa 3.5k) exposures I've made with my KP has been with this lens. For my very many "other" lenses I have a variety of bodies, most of which get used regularly, albeit not as extensively as my KP.
Forum: Pentax KP 02-11-2020, 11:39 AM  
All we need is a KP
Posted By kypfer
Replies: 105
Views: 2,962
HaHa :)

Now I'm looking forward to a new body for my long lens work so I can revert my KP to it's svelte persona ;)

When I'm using my "bigma" I have a neck-strap fitted to the lens, to keep the strain off the lens-mount when I'm carrying the camera. I learnt some while ago that having straps both on the lens and on the camera was a recipe for disaster, when in a hurry, so my KP has no strap fitted. I'm always very wary when I fit a shorter lens and have no strap to rely on. If I don't intend to use the big lens(es) I'll take out one of my other bodies instead :)
Forum: Pentax K-70 02-11-2020, 01:37 AM  
how would you improve the K-70?
Posted By kypfer
Replies: 42
Views: 3,484
If you're not using the "User" modes for anything else, you can set up adjacent modes in one or other configuration and switch between them whilst keeping the camera to the eye ;)

I used my K-70 like this for combinations of spot and multi a/f settings combined with AFS and/or AFC. Having to remove the camera from my eye to do the "two-finger shuffle" on the mode dial on my KP is a "feature" I don't consider helpful :(

Yes, I know the KP has an "AF Mode" button on the lens throat ... unfortunately even my large male hands can't reach it when I'm hand-holding a 150-500mm without taking the camera down :(
Forum: Pentax KP 02-10-2020, 09:52 AM  
All we need is a KP
Posted By kypfer
Replies: 105
Views: 2,962
I don't see that. The picture I saw shows a small but definite "feature" in the lower right-hand corner of the screen. Whether that's an inconvenient "hook your finger-nail in here" or a neat, if complicated "press here and I'll spring open" we'll have to wait and see ;)
Forum: Pentax K-01 02-08-2020, 01:36 AM  
Upgrade !
Posted By kypfer
Replies: 13
Views: 778
I upgraded from a K-5, which is a similar spec to the K-01, to a K-70 and was significantly impressed with the improvement in image quality, both due to the higher resolution giving me more cropping options and the extended low light capabilities.


Subsequently, I've further "upgraded" to a KP, in search of improved a/f performance, which this body provides well! The extra three stops of low light sensitivity (over the K-70) are a bonus.


However, if you don't need the extra capabilities of the KP, I'd definitely suggest the K-70 as a very valid upgrade from your K-01. The image quality of the K-70 and KP is, in general, identical. The KP is slightly more "ergonomically friendly" (less cramped) in my large hands, but the price saving between the two bodies could well go towards another lens ;)
Forum: Pentax KP 02-08-2020, 01:16 AM  
The bad news and the (mostly) good news.
Posted By kypfer
Replies: 8
Views: 646
Excellent combination - KP with a Tamron 90mm :)

If yours is the a/f version I've probably nothing to add.

My Tamron 90mm is the older m/f Adaptall-2 and has been a feature in my bag since the '80's. "Catch-in-focus" and "focus peaking" can make it a lot easier to use ;)
Forum: Pentax KP 02-06-2020, 02:36 AM  
All we need is a KP
Posted By kypfer
Replies: 105
Views: 2,962
It's not "very long", but a noticeable fraction of a second. With my K-70 and the K-5 before it, I would carry the camera on "stand-by" in power-save mode and when/if a subject presented itself (wildlife mostly) I could raise the camera to my eye and as soon as I touched the shutter button the a/f and metering would be active and the camera available to grab a shot ... assuming the a/f locked on ;)

With the KP there's a noticeable delay before everything "wakes up", so the subject may well be in a less-opportune position before the shutter will fire (ie. it's running/flying away!) ... however, once the a/f finds the subject it tends to "lock on" more readily and, if in AFC, track more reliably, than the K70 (or K-5).

This is all just my experience, mostly based on 15 months (20k shots) with the K70 and about 10 weeks (3k shots) with the KP, both using, mostly, my 150-500mm Sigma.
Forum: Pentax KP 02-06-2020, 01:36 AM  
All we need is a KP
Posted By kypfer
Replies: 105
Views: 2,962
I've taken to not using the "Power Save" mode and keeping the camera switched on full-time.

My limited experience suggests that there's not much "power-saving" actually achieved, the "inconvenience" of carrying a spare battery in my pocket is minimal and having the camera immediately available for that "split-second" shot (like my K-70 manages to do, even with power-saving!) is immensely gratifying ;)

I will emphasise at this point, I'm not using Live-View and the "Info" screen is off, so it's only the metering that's active.
Forum: Pentax KP 02-06-2020, 12:54 AM  
All we need is a KP
Posted By kypfer
Replies: 105
Views: 2,962
Excellent ideas :)
Possibly even optionally move the "User" modes to the right-hand wheel, so one might change from AFS/Single-Spot to AFC/Multi-spot with one click instead of two and keep the camera to the eye whilst doing so ;)
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