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Forum: Product Suggestions and Feedback 03-10-2018, 08:46 AM  
In-body scripting engine
Posted By RKKS08
Replies: 7
Views: 360
It seems a very basic scripting engine (at least a parser) is already present and could be extended.

Have a look for the commands possible in the SD card text file to initialize the debug mode of the K200D.
You can do more than just switch to debug.
Forum: Troubleshooting and Beginner Help 01-08-2018, 09:08 PM  
manual lens on Pentax K-2000
Posted By RKKS08
Replies: 7
Views: 342
While I wrote the following, all the subjects have been answered one by one by other members.
I'll still post it, as it puts them together:

If you dont own the manual, you can download it here:
Bedienungsanleitungen herunterladen - RICOH IMAGING DEUTSCHLAND GmbH
It is the German Ricoh site, but they offer most manuals in all languages spoken in the EU (still including English).

As the K2000 (named K-m outside the US) is basically a stripped down K200D (no WR, cheaper/lighter plastic case, no grip support, some functions missing), they sacrifized the "green button" for a "help" button. With the K2000/K-m, the +/-Av button is used instead.
Don't forget to set the aperture ring to working (manual page 241), it can stay with this setting forever.

The aperture will of course not close down while you change the value with the aperture ring. It will close down only during exposure, and for a moment when you press the +/-Av button.

So, for shooting with K and M lenses, the procedure is simple:
  1. Set the camera to M mode.

  2. Set an appropriate aperture with the ring.

  3. Focus

  4. Press the +/-Av button for a short time.

  5. Before now shooting, you may have a look at the exposure time the camera has set. If you don't like it, change the aperture setting and press the +/- Av button again.

Forum: General Talk 12-30-2017, 04:39 PM  
Your latest acquisition
Posted By RKKS08
Replies: 11,954
Views: 814,902
If you caught LBA, this cannot happen. Except, of course, there is a SWMBO.

These are occasionally seen on German eBay (I think labeled Prakticar, not Flektogon, but these are the same lenses). You can get them MUCH cheaper than the Flektogons, just as with the Rollei HFT lenses vs. the West German Zeiss (Distagon?) ones. Is it possible to stack a Praktika-M42 with a M42-PK adapter? The Praktika register distance is 1mm less than the K-mount distance, so it seems barely possible.
Forum: General Talk 12-30-2017, 03:47 PM  
Your latest acquisition
Posted By RKKS08
Replies: 11,954
Views: 814,902
A CZJ Flektogon 2.4/35mm for only €93 (including an adaptor I don't need).

On german eBay, these usually go for €120-€150, but it seems on the day before Christmas eve only hard core eBayers would bid.
On the outside it looks kind of used, but optics are clear, aperture ok and distance ring turns smoothly. Resolution/sharpness seems to be ok, but I still have to do some more elaborated tests.

I must be crazy, as I already own a bunch of 35mm lenses:
  • RMC Tokina 2.8/35mm (aperture stuck at 2.8). Quite soft at 2.8. This and the fact I got it very cheap did not encourage me to try a fix.

  • Revuenon special 2.8/35mm (M42). I got it for near to nothing, as the seller had not bothered to clean it on the outside, and it looked terrible not only on the pictures. A good outside cleaning cured this. The IQ was a very positive surprise, but the lens is big and quite heavy. I am not sure about the manufacturer, but it probably was an East German one.

  • Agfa Color 2.8/35mm (K bayonet). These were delivered with the last series of Agfa SLRs in the mid eighties, which were made by Chinon (with camera body design of Agfa). IQ seems to be on par with the Pentax-M 2.8/35mm (no tests, just comparing and pixel peeping real pictures). Unfortunately, no clicks from the extremly light going aperture ring; so one of the former owners probably used it for video.

  • SMC Pentax-M 2.8/35mm. This was one of my first eBay buys, many years ago. It turned out it suffers from the well known slow aperture syndrom. It reacts fast enough up to F5.6, but for smaller apertures it reacts too slow. Just to fix this lens I ordered a set of JIS screwdrivers from the US (Moody), but the screws turned out to be absolutely stuck, so I gave up.

  • Additionally, I own a very big amount of zooms which cover 35mm, but only the Tokina AT-X 2.8/35-70 is fast enough. But it often is too soft at 2.8.

Forum: Troubleshooting and Beginner Help 12-30-2017, 02:49 PM  
Auto EV Compensation
Posted By RKKS08
Replies: 11
Views: 491
:eek: :lol::lol::lol:
Forum: Troubleshooting and Beginner Help 12-30-2017, 01:52 PM  
Auto EV Compensation
Posted By RKKS08
Replies: 11
Views: 491
It would be nice if this explanation could be (easily) found also here on PF.
The official manual does not explain it well enough - like with many other features.
Forum: General Photography 12-11-2017, 04:23 PM  
The Archetype of the Manual 35mm Film Camera in popular culture
Posted By RKKS08
Replies: 23
Views: 1,177
Self-timers were used decades before this became a buit-in feature of camera bodies.
I remember when I got my "Agfa Clack" (Agfa Clack | Camerapedia | FANDOM powered by Wikia) in 1958, I opted for a birthday present of a mechanical "cable release" and an universal seperate self-timer. These were quite popular (a box half the size of a cigarette package with a buit-in clockwork, which was connected to the release cable).
Forum: Pentax Full Frame 12-06-2017, 04:27 PM  
trying to find a good but not too expensive hand strap for my k-1
Posted By RKKS08
Replies: 26
Views: 1,855
Look at post #2 of this thread from 2013:
Neck strap or hand strap? Both -

By now I have implemented this solution with all of my three Pentax bodies.
The hand straps themselves are diferent ones, but the kind of fixing it to the bodies is the same.

The only modification I meanwhile have done is the replacement of the base plate delivered with the hand straps by modded plates from quick release units (cut a slit into it to fasten the hand grip strap). You have to search, however, for plates compatible with your preferred quick release system, which offer enough space for the slit without compromising the stability. And stay sceptic in believing sellers "compatibilty" with any given system.

Attachment 379575
Forum: Pentax Film SLR Discussion 12-05-2017, 06:27 AM  
Pentax P30 prime lens
Posted By RKKS08
Replies: 8
Views: 516
The 28-80 was the kit zoom for the lower end Pentax series of that time (about the same angle of view as the DA 18-55 for APS-C).

If the lens really is the Pentax A 3.5-4.5/28-80 (no "SMC"). In some areas it was also sold as "Takumar [Bayonet]" and also as "Profile".

But Pentax offered also a SMC-A 3.5-4.5/28-80, which not only has SMC coatings, but a much more sophisticated optical design (and it was way more expensive). This one offers near prime IQ in the range of 30-70mm. On German eBay, it is offered only 3-4 times a year.
Forum: Troubleshooting and Beginner Help 11-28-2017, 03:25 PM  
Pentax ME Super - Wind Lock not engaging everytime
Posted By RKKS08
Replies: 4
Views: 380
If you need detailed (pictured) repair instructions, PM me.
I cannot put them to this forum for possible copyright problems.
Forum: General Talk 11-09-2017, 11:57 AM  
Your latest acquisition
Posted By RKKS08
Replies: 11,954
Views: 814,902
A Meike D-BG4 (Chinese clone of the Pentax battery grip for the K-7/K-5). From eBay, described "as good as new").
5.- (plus 5.90 for registered shipment).
I was the only bidder.

I am not sure I will ever really need it, but at this price I could not withstand.
Forum: Pentax Price Watch 10-20-2017, 09:45 AM  
Another Pentax-A 3.5/15mm
Posted By RKKS08
Replies: 3
Views: 495
Now I was curious and searched.
I found 2 more of them, plus 2 with a modified mount for Nikon.
The better ones with original mount are:

Pentax 1:3,5 15mm SMC Objektiv | eBay
Pentax Asahi SMC 3.5/15 mm #5067226 Lens | eBay

But from the descriptions it seems they are either not in a near mint condition, or/and not absolutely complete (caps, box).
Forum: Pentax Price Watch 10-20-2017, 03:30 AM  
Another Pentax-A 3.5/15mm
Posted By RKKS08
Replies: 3
Views: 495
Another offer of the very rare ones for the legendary SMC Pentax-A 3.5/15mm.
It is on eBay Italy, delivery worldwide. but a hefty shipping fee (as nearly always with offers from Italy).

SMC Pentax-A 15 mm. F3.5 Full Frame K1 boxed ultra rare KA 15 3,5 | eBay
Forum: Pentax K-S1 & K-S2 10-14-2017, 01:51 PM  
K S2 vivitar k mount old lens
Posted By RKKS08
Replies: 5
Views: 525
It is in menu C4 of the K-S2.
Select "Enable" in "28 Using Aperture Ring".
Page 115 of the PDF version of the user manual.

And thank you, Not a Number. I forgot about the possible problem with the protective shield for the aperture lever.
Pentax lenses had a shorter shield than some of the older 3rd party lenses (Sigma, some Vivitar, and others).
When Pentax introduced the lenses of the Power Zoom series, they added a small box with contacts for the power supply of these lenses (which is now used to service lenses with built in AF motor). If the protecting flange is much longer than that of the Pentax lenses, the lens cannot be mounted. One could use a dremel to shorten the shield a bit. I once had to return a Sigma 2.8/28 II which I did not want to modify, as it was in mint condition.

If you don't own the manual, you can download the English version as a PDF file.
Forum: Pentax K-S1 & K-S2 10-14-2017, 07:20 AM  
K S2 vivitar k mount old lens
Posted By RKKS08
Replies: 5
Views: 525
With a fully functioning copy of this lens you cannot damage your K-S2, as there are only 2 possibilities to do it:
  • There are lenses where the last lens element is reaching too far inside the body, which could block the mirror. But as this lens was designed for Pentax FF bodies (where the mirror is much bigger), there can't possibly be a problem with your APS-C camera.

  • If the aperture lever of the lens is damaged (bent), it could stuck the aperture actuator of the body and damage it. But this is true for ALL lenses.

The bayonet of Pentax lenses was always blank metal, some 3rd party lenses are anodized (blacked). This was not a problem with older Pentax analogue cameras, but DSLRs and later analogue models may not fire, as they cannot detect whether a lens is attached.

To work with this lens, and all "M" type lenses (Pentax and 3rd party):
  • Search in the settings menu for "enable usage of aperture ring" (exact text may vary between models), and set it to "ON". You can leave it that way permanently, it does not do any harm. It is just to prevent you using KA/KAF lenses (with aperture ring) in P or Tv mode when you involuntarily moved the aperture ring away from the A position.

  • Set the camera to M mode. Set an appropriate aperture with the aperture ring on the lens.

  • Do stop down metering. With most (but not all) Pentax bodies this is done by pressing a "green button". If the K-S2 does not offer such a button, have a look at your manual how to do it. The camera will now set a correct exposure time fitting to your aperture and ISO setting.

  • After stop down metering, there are possibilities to modify the chosen setting before firing, which vary between Pentax models. Have a look at your manual.

EDIT: I forgot to mention: the exposure value set by using stop down metering will stay, which means under constant light conditions you don't need to repeat it, just fire away.
Forum: Pentax DSLR Discussion 10-07-2017, 10:52 AM  
Pentax D-LI50 battery
Posted By RKKS08
Replies: 4
Views: 756
After bad experiencies with other labels, I always take Pantona (German company, but of course produced in China).
I am using them for my K-5 as well as my Lumix DMC-LX5 (and before did for the LX3).

I saw that they often offer 2 versions: a cheaper one with about 15-20% less nominal capacity, and a more expensive one with 15-20% more than the original battery. I found they lose their capacity much earlier than the Pentax labeled ones, but here they are about 75-85% cheaper. So what? I can at least buy 5 of them for the price of one Pentax.

But I would be aware of Pantona battery chargers. It seems they just re-label cheap Chinese standard devices, which are not up to what we are used to in my country.

As an afterthought: the overheating problems with a Pantona charger as reported by one PF member could be an US problem.
Most of the world use 220-240V as standard home voltage. So the device might originally have been optimized for 240V AC down to the DC charging voltage.
If they used a (too) simple design for this process, it may result in doubling the energy transformed to heat when applied to 110V AC.
Forum: Pentax Medium Format 10-04-2017, 06:27 AM  
K-1 or 645n
Posted By RKKS08
Replies: 20
Views: 1,272
Someone has compared the K-1 crop mode with the K-5 in one of the many early K-1 threads.
I can't find it right now, but as far as I remember, the difference was not a big one, and the K-1 was at least not a clear winner concerning IQ...
Forum: Troubleshooting and Beginner Help 09-12-2017, 10:47 AM  
Flash stupidity question
Posted By RKKS08
Replies: 9
Views: 743
Setting the flash zoom for wider than what the lens focal length would suggest can sometimes have a positive effect.

Inside, specially in smaller rooms, there will be more light bouncing from walls and ceiling, which may produce a less flat appearence of the picture. Whether this will improve the result, will depend on many things.
You should experiment with it a bit, to get a feeling of when to use this effect, and when better not.
Forum: Troubleshooting and Beginner Help 09-05-2017, 09:09 AM  
Bright Colored Mystery Spots in JPEGs Only
Posted By RKKS08
Replies: 11
Views: 915

If the problem is indeed caused by clusters of dead and hot pixels on the sensor (which I doubt), it could mean that the in-camera raw file display makes its own demosaicking, but the in-camera jpeg engine does not use these processed raw data and starts from scratch using the sensor data themselves.

A test may (or may not) reveal this: shoot raw only, and some pictures later (when you are sure the buffer does not hold any data of the picture) do an in-camera RAW to JPEG conversion. Investigate whether the JPEGs now look different.
And process the JPEG externally, after shooting RAW only. Does it look different?
Forum: Pentax K-r 09-04-2017, 04:42 PM  
TESTS: Plated vs Painted (conducting vs non-conducting) lens mounts on K-r: whats t
Posted By RKKS08
Replies: 8
Views: 3,543
My K-5 does.
It works as expected with a SMC-M 1.7/50, but neither green button nor DOF preview work with my Petri 2/28 (which works with both methods with my K200D). The Petri lens mount is NOT "black anodized".

However, after shorting pin 7 with a small piece of tin foil as a test, the K-5 will do. So there must be some kind of isolating surface which cannot be seen.
Forum: Troubleshooting and Beginner Help 09-04-2017, 03:24 PM  
Bright Colored Mystery Spots in JPEGs Only
Posted By RKKS08
Replies: 11
Views: 915
I don't think sensor cleaning will help. Dirty spots on the sensor produce black spots on the picture just as there were dark spots in the scenery.

The situation can be different with pixels known as faulty. Because these pixels are interpolated from neighbouring pixels which are not listed as defect. I remember Pentax had a major problem with the first badge of the K20 (I think it was solved with one of the firmware updates?). The problem there occurred when horizontal borders between light and dark areas met a known defective pixel, with that pixel just on the darker side. The algorithm used only a small number of neighbouring pixels for interpolation. As only the light side, but not the dark side (value=0) could contribute to the interpolation, the missing pixel would be replaced by a red, blue, or green one. This was very visible specially with zebra-like horizontal patterns.

This also was a proof how many dead pixels are located on any sensor, which are disabled already by QC in the factory - for the 14MP sensor obviously 50-100.

But the problem of the OP is probably not related to dead pixels. Can it be seen on the camera display?
Forum: Video and Pentax HDSLRs 09-03-2017, 03:55 PM  
K1 Video is not that bad
Posted By RKKS08
Replies: 26
Views: 1,853
The Helios 44-4 was sold with M42 mount (Helios 44M-4) and K mount (Heilios 44K-4).
As far as I know, these two are otherwise identical.

For that kind of work it probably won't matter, but for other applications it may be more convenient not to use an adapter (changing lenses in the field comes to mind).
Forum: Pentax SLR Lens Discussion 09-01-2017, 04:29 PM  
What other Chinon lenses are M42 mount ?
Posted By RKKS08
Replies: 24
Views: 1,420
If you are looking for Chinon K mount lenses, you can also search for "Agfa Color" lenses.
Agfa Selectronic - - The free camera encyclopedia

They are often offered on German/European eBay.
What I saw the last 3 months were
It is said they are all Chinon lenses, ment to be used with the K mount Agfa Selectronic SLR series.
These series were also completly Chinon inside, just got another outside design.

I just saw that the K mount Revueflex AC2 (Foto-Quelle) is based on the same Chinon SLR as the Agfa Selectronic 3, just with again another outside design.
So any lenses sold with/for this camera (probably branded Revuecolor or Revuenon) may also be Chinon made. But in this case I would look for design similiarities, as Foto-Quelle ordered lenses from West Germany, East Germany, Japan, and Soviet Union.
Forum: Pentax SLR Lens Discussion 08-31-2017, 02:23 PM  
Chinon/Revuenon Autofocus 50mm 1.7 - AF for any K-mount?
Posted By RKKS08
Replies: 7
Views: 667
When the German Agfa company started to offer SRLs (with K mount), they did neither develop nor produce these themself. Here it is said they all are Chinons (bodies and lenses), and that they are quite good.

Presently you can find about one such lens per week on German eBay ("Agfa-Color").
These are 2.8/28, 2.8/35, 1.4/50, and 2.8/135 (or 3.5/135?). A while ago, I got a 2.8/35 for near to nothing. I haven't really tested it yet (I got several other F35mm lenses). But one of the owners probably used it for video, as the aperture setting is stepless, and I don't like this very much. Despite I should be used to it from old soviet rangefinder lenses.
Forum: Pentax Full Frame 08-22-2017, 07:23 AM  
Pentax K1 review in German
Posted By RKKS08
Replies: 11
Views: 1,598
He was using solemny the FA77 and was quite happy with its performance.

He tried, but did not like the zoom (generally doesn't like zooms), with this the unit was too front heavy. If he would ever buy a K-1, it would be only with the battery grip, because in his very big hands even the K-1 felt tiny.
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