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Old Jan 8, 2018, 9:07 AM   #1
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Default Looking for a focusing screen!

Does anyone have a split image rangefinder screen that fits the *istDS? I had one in a camera which was unfortunately stolen from my son and now I would like one to get back into using my MF lenses on an old DS. Willing to buy or trade for it if the price is reasonable. The electronic rangefinder in the camera is difficult to work with because it can be rather slow and my old eyes can't judge accurate focus from the camera's stock screen.

If you have one or know of a source which may still have one, please let me know.
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Ira
Riverview, NB, Canada
http://aicphotography.blogspot.com/
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Current equipment
Pentax *istDS, K10D, K3:
FA 35mm f2, FA 50 f1.4, FA 28-70mm f4, FA 28-80mm f3.5-5.6, FA 80-320mm f4.5-5.6, F 50mm f1.7, Tamron SP 70-200mm f2.8 Di, DA 10-17 f3.5-4.5, DA 14 f2.8, DA 16-45mm f4, DA 18-55mm f3.5-5.6, AF-540FGZ

Olympus E-P5, OM-D E-M1: 9mm to 150mm lenses

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Old Jan 8, 2018, 10:48 AM   #2
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Well, ignore this, there is still a Chinese source for these focus screens so I am purchasing a 45degree split image screen for just $20. I will report my findings when I receive it.

If this works out I have a fairly complete set of manual lenses from 28mm to 200mm. They include Pentax M 50mm f2, 50mm f1.7, 200mm f4 and from Ricoh, Rikenon XR (their best at the time) 28mm f2.8, 50mm f2, 135mm f2.8 and finally a 70-150mm f3.8 constant aperture zoom. This should be fun (I hope). All are made in Japan all metal bodied lenses from the late 1970s early 1980s so they will not have the optical perfection of modern lenses but will be a joy to use with smooth focus operation and clicky aperture rings. I have "serious" modern gear for when the image is the most important thing but this will be the fun stuff where image quality is not as important as the act of creating the image. The single control thumb dial of the DS will serve just as a shutter speed dial and the AEL button will give me a ballpark exposure setting to work from.

Too bad shipping from China takes so long. Can't wait!
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Ira
Riverview, NB, Canada
http://aicphotography.blogspot.com/
_______________________________
Current equipment
Pentax *istDS, K10D, K3:
FA 35mm f2, FA 50 f1.4, FA 28-70mm f4, FA 28-80mm f3.5-5.6, FA 80-320mm f4.5-5.6, F 50mm f1.7, Tamron SP 70-200mm f2.8 Di, DA 10-17 f3.5-4.5, DA 14 f2.8, DA 16-45mm f4, DA 18-55mm f3.5-5.6, AF-540FGZ

Olympus E-P5, OM-D E-M1: 9mm to 150mm lenses

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Old Jan 8, 2018, 2:18 PM   #3
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Monza76,

Please post how your focus screen works out.

If it works out, I'll be tempted to get one for one of the Pentax ist DS floating around my house.

I ordered a cheap Chinese 45 degree split image focus screen for my Pentax K100d years ago. I was not very happy with it. I would focus and take the picture, but the image was still out of focus.

But I have dusted off my Pentax and Cosmicar manual focus lenses, looking to get back to playing around this summer.

I've got myself half decently covered from 28mm to 200mm.

Cosmicar 28mm f/2.8 (An auto K-mount lens.)
Pentax-A 50mm f/1.7
Pentax-A 100mm f/4 macro (with extension tubes available)
Pentax-A 70-200 f/4 constant aperture.

Take care & Happy Shooting!
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NOTE: I'm trying to capture the picture in my head! Not the one my camera sees!

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Old Jan 9, 2018, 5:36 AM   #4
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Quote:
Originally Posted by tacticdesigns View Post
Monza76,

Please post how your focus screen works out.

If it works out, I'll be tempted to get one for one of the Pentax ist DS floating around my house.

I ordered a cheap Chinese 45 degree split image focus screen for my Pentax K100d years ago. I was not very happy with it. I would focus and take the picture, but the image was still out of focus
The K100d has a pentamirror and shims for the focus screen, the DS has a solid pentaprism and I don’t think there are shims. Just that small difference could have resulted in focus errors. If you still have the screen it will fit the DS so you can try it out.


BTW I also have 28mm to 200mm covered in old manual lenses.
My old lenses:
28mm f2.8 Rikenon
50mm f1.7 SMC-M
135mm f2.8 Rikenon
200mm f4 SMC-M

And recently I got a great deal on a Ricoh film camera and added another 28mm f2.8,
50mm f2 Rikenon
75-150mm f3.8 Rikenon zoom (constant aperture)

Hopefully there won’t be a severe focus error with the new screen.
__________________
Ira
Riverview, NB, Canada
http://aicphotography.blogspot.com/
_______________________________
Current equipment
Pentax *istDS, K10D, K3:
FA 35mm f2, FA 50 f1.4, FA 28-70mm f4, FA 28-80mm f3.5-5.6, FA 80-320mm f4.5-5.6, F 50mm f1.7, Tamron SP 70-200mm f2.8 Di, DA 10-17 f3.5-4.5, DA 14 f2.8, DA 16-45mm f4, DA 18-55mm f3.5-5.6, AF-540FGZ

Olympus E-P5, OM-D E-M1: 9mm to 150mm lenses

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Last edited by Monza76; Jan 9, 2018 at 5:44 AM.
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Old Jan 9, 2018, 10:10 AM   #5
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Quote:
Originally Posted by Monza76 View Post
The K100d has a pentamirror and shims for the focus screen, the DS has a solid pentaprism and I don’t think there are shims. Just that small difference could have resulted in focus errors. If you still have the screen it will fit the DS so you can try it out.
I do still have the screen. I tried it on the DS, but its a different size.

But one of the reasons I went back and got the DS even though I had the K100d was because of the Pentaprism.

I was curious how much brighter the viewfinder might be.

And . . . even with my bad eyes, I could see a difference. So much so that when manually focusing these old lenses, I could get a much, much higher rate of in focus shots with the DS over my K100d.

Knowing that, I'm kinda tempted to get something like an old Pentax K-S2. That one has a pentaprism, doesn't it?

Quote:
BTW I also have 28mm to 200mm covered in old manual lenses.
My old lenses:
28mm f2.8 Rikenon
50mm f1.7 SMC-M
135mm f2.8 Rikenon
200mm f4 SMC-M

And recently I got a great deal on a Ricoh film camera and added another 28mm f2.8,
50mm f2 Rikenon
75-150mm f3.8 Rikenon zoom (constant aperture)

Hopefully there won’t be a severe focus error with the new screen.
+1

Nice line-up!

And a lot of primes.

That is what I am planning to play around with more so this Summer.



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Take care & Happy Shooting!

NOTE: I'm trying to capture the picture in my head! Not the one my camera sees!

Personal Flickr Favs: http://www.flickr.com/photos/tacticd...7631300869284/
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