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Forum: Welcomes and Introductions 05-16-2022, 09:28 AM  
Hallo from Germany!
Posted By RKKS08
Replies: 9
Views: 282
Welcome to the forums, too.
Forum: Pentax DSLR Discussion 07-19-2021, 10:38 PM  
Anyone else miss the K200D?
Posted By RKKS08
Replies: 1,108
Views: 195,616
It's a long time since I used my K200. I remember I used it for a while in setup mode. You are right about the door, it must be open only for the lnitialissation. I can't remember any side effects of running it in setup mode permanently. Maybe there wss some difference in when the back display would show things automatically. But I am probably mixing this up with the K-5.
Forum: General Photography 06-08-2021, 06:57 AM  
Present color models not suitable for people with darker skin
Posted By RKKS08
Replies: 19
Views: 1,245
I agree with you (mostly).
But keep in mind that with movie films the only way to improve color tones of dark people was using illumination - and this only in a controlled environment.
Godard found it was impossible to show realistic color tones with a Kodak film - so for him the film material itself was the culprit. Which indeed it was.
I don't think he wanted to pin the "racist" label to the people who developed the technique. The development obviously follows the needs of the film industry.
Forum: General Photography 06-08-2021, 06:00 AM  
Present color models not suitable for people with darker skin
Posted By RKKS08
Replies: 19
Views: 1,245
Unfortunately, the target of the following link is in German only.
Right now, I don't have the time to translate it (and I am not sure whether it woul break ciopyright restrictions in either Switzerland, Germany, or the USA).

Rassismus in der Fototechnik - Die Kamera ist rassistisch ? Google und Snap wollen das ändern - Kultur - SRF

It is about the color models used for skin tones. which do not allow to show reasonable details about the skin of dark colored people without ruining the rest of the picture.
It seems all this started with the "Shirley card" of Kodak in the 1940s. There were many improvements to this card, but all ment to show the skin tones of white people more realistical.
Maybe some people remember that Jean Luc Godard refused to use Kodak materiaL for a Cinema film in Mosambique, calling the Kodak movie film material "rassist".

When Kodak started to offer real improvements in the 1970s, it obviously was not to improve photographies of black people, but because booming advertisments had difficulties to show realistic colors/shades of chocolate and furniture.

The reason for the link right now is the fact, that (according to the Swiss souce) both Google and Snapchat have annouinced changes in their color models in respect to dark skin tones.
We will see.

You Tube

Forum: Pentax Price Watch 06-02-2021, 11:30 AM  
Dedicated lens hood of the DA 55-300
Posted By RKKS08
Replies: 3
Views: 508
On German eBay there is an offer for a clone (?) of the Pentax PH-RGB 58mm, which they say is dedicated for the DA 55-300mm. The lens hood is Hongkong made, but sent from a location within Germany. Price including shipping would be about $ 5.-
They have just a view items on stock, so probably someone imported a couple of them to sell them locally.

PH-RBG 58mm Gegenlichtblende Schwarz für Pentax SMC-DA 55-300mm f/4-5.8 ED | eBay

My question is now: would the hood also fit to the FA 100-300 (there was never a dedicated Pentax for this lens). The FA has also a 58mm filter thread (but probably the DA offers a bayonet for the shade?).
Anyone who has the DA and the FA and has tried to use the DA hood on the FA?
Forum: Lens Clubs 05-07-2021, 04:08 AM  
East German Lens Club
Posted By RKKS08
Replies: 406
Views: 76,106
While not very fast, for decades the Carl Zeiss 4/25 was a must own for every professional photographer for creating nearly distortion free architecture pictures. Keep in mind, that in alalogue times, you could not correct distortion afterwards. I think there was a later 2.8/25 which was better in most respects, but had some more distortion. It was used a lot for landcape, but many photographers still preferred the older F4 for archtecture.

I never owned any of the two, so my knowledge is just from many german and english speaking photography sites, and magazines from before the internet.

I am very sorry!!!
Must be the age. I mixed up the Carl Zeiss 20mm and 25mm lenses.
So, about the 4/25, I don't have any more information than you.
Forum: Pentax DSLR Discussion 02-04-2021, 07:45 PM  
DSLR as webcam?
Posted By RKKS08
Replies: 32
Views: 16,189
Just to add some (a bit outdated) information:

The Optio 60 was quite officially usable as a webcam.
You needed to install a special program from the disc coming with that camera, and of course to use a cheap universal power supply instead of eneloops would have been a good idea.
Forum: Pentax K-5 & K-5 II 12-08-2020, 07:20 AM  
What are your most used lens and what do you use them for? What lens do you have that
Posted By RKKS08
Replies: 55
Views: 9,535
If I don't know what I will shoot:
Tamron 17-50 f2.8 or Sigma 18-125 f3.8

DA 35 f2.4 or SMC-A 50 f1.4 + optional TC SMC-A 2x
Carl Zeiss Flektogon 35 f2.4
Zenit MC Helios 44K-4 58 f2.0 (rare portraits)
SMC-A 35-105 f3.5
Soligor C/D 75-205 f3.8

For bad weather:
DA 18-55 WR
DA 50-200 WR

Mostly inside, in-camera deviation correction on short end:
DA 16-45 f4

SMC-M 50 f4 macro

Unfortunately most of my other many many lenses don't see much use.
Forum: Welcomes and Introductions 06-04-2020, 09:12 PM  
Hello from Karben (near to Frankfurt/Main in Germany)
Posted By RKKS08
Replies: 9
Views: 502
Welcome to the forum.

A short look at the map showing registered members results in the sad fact there are just a handfull pentaxians in the Rhein-Main area with its near to 6M inhabitants.
So the existence of Pentaxforums can be really helpful to stay informed and to exchange knowledge.

Myself I presently am kind of imprisoned - not because of Corona, but other serious health deficits.
So right now I am just a "theoretical" photographer. Whether this will change in the forseeable future - who knows; I am now near to 73 years of age.
Forum: Pentax K-5 & K-5 II 04-20-2020, 08:44 AM  
16.3 Megapixels?
Posted By RKKS08
Replies: 11
Views: 10,197
The processed values are based on interpolations of the adjacent physical pixels.
This means after this step the number of processed pixels for all following calculations will be smaller by one column and one row.

Possible other reasons have already been mentioned.

I used to work for coordinate measurement systems (software and concepts) for most of my active time (I am now 73).
When processing measured 3D profiles, you get a cloud of seperate points in which the software must fit a 3D profile.
With nearly every step of the processing, all bordering points willl get lost, as the result of a single sided interpolation is less reliable.
Forum: Product Suggestions and Feedback 10-15-2019, 09:00 AM  
Long exposure and the viewfinder
Posted By RKKS08
Replies: 62
Views: 4,048
There was a time when lots of old, but unused Pentax straps were frequently offered on eBay.
The ones with 2 compartments, for the viewfinder cover and the flash shoe cover.

I bought these for all my many Pentax cameras.
I also think these straps were the best Pentax ever sold, not only for the compartments.
Forum: Pentax K-1 & K-1 II 10-09-2019, 02:38 PM  
Use of LCD screen
Posted By RKKS08
Replies: 21
Views: 1,514
My first Pentax was a ME Super.
I thought the 2 buttons to set exposure time were a good idea.
I could change time fast without taking my eye from the VF.
But I hated I could not see which time I had set before looking through the VF.

With the Super A ("Super Program" in the US) they introduced a small top LCD window showing the set exposure time.
While this feature was not available in all 4 modes (M, Av, Tv, P) I found it a great improvement.

I am still so used to it, I would not buy a body lacking a top LCD.
Specially as these now-a-days also show aperture, ISO, EV, and how many pictures may still fit on the SD card.

To have this infos in advance may save a lot of shots of people without "posing".
Once you look through the VF people will realize you may take a picture, and if you don't do it immediately, the result often may not look natural any more.

Of course using LV would be another option.
But for me, back screen/LV is ok with small cameras, with the heavier DSLRs I don't use it hand held.
Sometimes on a tripod, but I very seldom carry a tripod with me.
Forum: Welcomes and Introductions 10-05-2019, 04:48 PM  
my introduction
Posted By RKKS08
Replies: 13
Views: 464
Welcome to this forum.

I am just curious.
Was there any specific reason not to post even once since you registered to this forum more than 4 years ago?

Reminds me of a schoolmate who stayed silent for years after registering in a German forum.
When I met her and asked, she said:
"Oh, my grand-daughter thought it was a good idea to register me without first asking. I was just too lazy to de-register."
Only years later, she sent her first posting.
Forum: Troubleshooting and Beginner Help 09-28-2019, 03:21 AM  
Pentax KS2 aperture ring problem
Posted By RKKS08
Replies: 7
Views: 1,839
You know the lens will only close the aperture during green button metering and while the exposure is taken?
All the rest of the time the aperture stays fully open (as long as the lens is fixed on the body).
Detached from the camera, the aperture will follow the ring setting.

This behaviour is different from that of M42 lenses.
Sorry if you already know all this.
Forum: Pentax Price Watch 09-12-2019, 05:29 AM  
Rare PK-A extension tubes on UK eBay
Posted By RKKS08
Replies: 3
Views: 812
Mainly for members located in the EU:

There is a PK-A extension tube set on eBay.
Of course the auction could still end up at a creazy high price, as usual for this item,
the more as it ends on Sunday evening.

I already got such a part, and luckily quite cheap.
This was because the seller had not mentioned the contacts, and the pictures did not show them quite well.

Jessop Auto extension Tubes For Pentax KA | eBay
Forum: Pentax K-5 & K-5 II 09-08-2019, 09:23 AM  
Rubber door usb/hdmi/dc port K-5 came of.
Posted By RKKS08
Replies: 15
Views: 2,964
A bit late to add information, but I don't think this is important enough to open a new thread.
Easily to find with a searching machine which prefers German language:

Rüdiger Maerz is either authorized support and/or repair center for
and some more.

They also have their fingers somehow in the Canon Pro Service (renting and support on site).
Their main business seems to be with Canon anyway.

Ricoh Pentax do list them as their only authorized repair center in Germany.
I personally had never heard about them.

Rüdiger Maerz GmbH
Süderstraße 75a
20097 Hamburg

Telefon +49 40 731 40 77
Fax +49 40 732 68 38
Forum: Welcomes and Introductions 09-06-2019, 03:52 AM  
Greetings from the Netherlands - part 1
Posted By RKKS08
Replies: 10
Views: 720
Hi from Germany.
I have not been in the Netherlands since my school days (in1963), but in the eighties quite often for business in Belgium.

By the way (but you probably know anyway): for M42 lenses with Pentax DSLRs you don't need stop down metering, Av will do alright.
Forum: Film SLRs and Compact Film Cameras 09-06-2019, 03:34 AM  
ME Super Trigger Voltage
Posted By RKKS08
Replies: 6
Views: 826
Back in the seventies I used flashes with trigger voltages up to 150V with my ME Super - never any problems.

Electronic-heavy cameras of that era were still rare.
I seem to remember Pentax advertised the LX to use a Mercury tube switch to separate the flash trigger circuit from the body electronics.
Forum: Troubleshooting and Beginner Help 09-04-2019, 11:59 AM  
Can you recommend a good "budget" tripod?
Posted By RKKS08
Replies: 28
Views: 2,685
Thanks to MarkJerling and macman24054 for the recommendation of the ZOMEI Z818

I cross checked with comparable offers and finally decided to order it.
I got it from a Germany located Chinese eBay seller for EUR 95.99, including VAT and postage.
So the net price is about the same as the reduced one on aliexpress.

Now I own 3 tripods for 3 very different applications:
  1. The small and extremely light weight but still sturdy Hama "Traveller mini pro" (749g including ball head), Aluminium.

  2. The ZOMEI Z818, more robust than the Hama and much more stable with extended legs, offers also monopod, 1733g, Carbon.

  3. A Velbon VS-3 which I bought used in good condition in the late 1980s. Not small, Aluminium, rather heavy, very sturdy. Center column can be rotated vertically in several steps down to 90 deg.

As I presently don't own a car, the Velbon doesn't see outdoor usage anymore; it is too heavy to carry around (for me, I'm now 72, wasn't a problem being 50/50+).
Forum: Pentax Camera and Field Accessories 08-25-2019, 03:59 PM  
simple K5 plus prime wraparound case
Posted By RKKS08
Replies: 9
Views: 1,299
I realize I am a bit late for this thread, but I think such a case could be easily made. It would not be so much different from the Pentax cases in the eighties.

I do own a leather body case which fits to the Lumix LX3 and LX5. Its design should also work for DSLRs.

It is a two part design, made of genuine leather.
One part (which can stay attached all the time) is a base plate with a 10-20 mm high vertical stripe covering front and sides, fixed at the tripod mount.
The second part covers all the rest of the camera and is fixed at the first part in two points, each one at the sides just above the base plate.
This second part can be rotated around these points, or detached completely.
The LCD and all controls would be accessible.

Unfortunately the version for the Lumix is not easily manageable, as the leather is quite thick and stiff. That is OK for the bottom plate, bot rotating the top can be a pain. But I think the design would work quite well if the top part would be made of a softer and thinner material. Maybe even better if it would be elastic.
Forum: Pentax SLR Lens Discussion 07-12-2019, 04:19 AM  
Macro lens suggestions?
Posted By RKKS08
Replies: 27
Views: 1,878
The 50mm macro was used quite a lot for reproductions (paintings and documents), especially because of its flatfield characteristic and lack of distortion.
The dedicated macro stand gave the correct distances for standard document sizes.

100mm would have made the arrangement unnecessary big.
Forum: Pentax Price Watch 06-22-2019, 06:53 AM  
Macro tubes with electric contacts
Posted By RKKS08
Replies: 9
Views: 1,161
I had looked for these for years, no offers or offered at crazy prices..

Then I started to have a close look at each picture on eBay.
And about a year ago there was one, offered just as "auto", with very low quality pictures, but there seemed to be contacts, difficult to see.

And I was right: noname in Pentax design, looking unused in perfect condition, and working flawlessly.
I think I won the auction (Gixen!) with about EUR 20. I know I was lucky.
Forum: Pentax Camera and Field Accessories 06-09-2019, 09:18 AM  
Do non-Pentax batteries really deliver more shots? (D-Li90)
Posted By RKKS08
Replies: 27
Views: 3,388
That's a result of the electro-chemical processes when charging, which is enhanced by quick charging.
You will see it happening with the flat batteries, as used by P&S models of all brands. After about 3 years of usage even all of my original small Pentax batteries start bulging - and I do charge these only with the Pentax charger.

What I think is even dangerous is the fact, that many of the 3rd party chargers for small batteries don't provide the 3rd contact, or it is just a dummy. With this contact the batteriy tells the charger that it is too hot, and the charger should pause charging till the internal temperature becomes acceptable again. This behaviour of many aftermarket chargers could also explain the shorter charging time.
Forum: Pentax SLR Lens Discussion 06-05-2019, 11:38 AM  
Best wide-angle lens for K-1?
Posted By RKKS08
Replies: 54
Views: 6,486
The A20, A24, and A35 always got very positiv reviews not only on this forum.

For 20mm, you could also look for the m42 East German Zeiss lenses. If "landscape" includes Architecture, the older 4/20 should be better than the newer 2.8/20, as it is said to be distortion-free. For decades the Zeiss 4/20 was the "standard" WA lens for architecture photography worldwide.

If you already own the (APS-C) 4/16-45mm: on FF it heavily vignettes at 16-19mm, and has its sweet spots (contrary to the kit zoom) at the short and long end. But at 20-21mm it should provide decent results on FF. I probably would not buy one just to try this out, but if you happen to own it anyway . . .
Forum: Pentax Camera and Field Accessories 06-02-2019, 03:58 PM  
Flash exposure using PTTL
Posted By RKKS08
Replies: 13
Views: 1,569
@stevebrotI did not know the pre-flash power is controlled by the estimated subject distance.

Does this mean bouncing to a high ceiling may fool the pTTL system, as then the pre-flash output may be too weak to deliver usefull results?
That is, if the flash does not inform the camera that bouncing is used. I don't know whether this is the case.

Of course I could find out the answer by doing some tests, but at home the ceilings are not high enough, and you (or someone else) may already know the answer.
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