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11-14-2011, 06:41 AM   #1
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Focusing screen and slow apertures

Hey guys!
I bought my Pentax K-r exactly 1 month and 14 days ago, and im getting addicted to this!I already have a 18-55 kit lens, a 50-200 and a 50mm f1.7...
And im interested in a focusing i have a couple of questions
Does this one (Diagonal Split Image Focus Screen Pentax K100D K200D DL | eBay) makes the manual focus really EASY? (ps : im 14 years old, so 0 film-era experience here :P)
Will i be able to use it with the 18-55 and 50-200 at the 5.6 apertures? People are saying that the screen "blacks out" at those slow apertures...
Also, even using the f1.7, in the night, is it darker than the original screen?

11-14-2011, 09:58 AM   #2
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I have a similar one in my K100D, mine is the dual split from the same seller. It will black out with f5.6 if your eye is positioned wrong. I just tried with my Super Takumar 50 f1.4, if I keep my eye positioned in the sweet spot, it won't black out until f11.
11-14-2011, 10:21 AM   #3
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I've got one from this seller in my k-x and it works fine, I don't seem to get any blackout problems at all. Possibly that's because I naturally use an aperture large enough to not cause problems in low light. Mine really has improved my manual focusing, and something I only found out about a few days ago is properly setting up your dioptre. Here's a link to the thread.

Oh, and you'll have loads of fun with your 50 and manual focus, mine's my favourite lens.
11-14-2011, 10:23 AM   #4
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depend on the light. I got a similar focusing screen and in summer, it's never dark, but now that the sun is low, that light is less harsh (it's winter in Europe), at F5.6/F8 it's dark and not very confortable.

But, in that case, the help of the AF confirm does the job well too

Last edited by aurele; 11-14-2011 at 10:34 AM.
11-14-2011, 11:00 AM   #5
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Original Poster
So you guys recommend the focusing screen?
Is the process really that easy?
Thanks again
11-14-2011, 11:05 AM   #6
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I have one (split image) on my K2000 (Km) and was going to get one for my Kr but manual focusing using the stock screen on the Kr is better than my Km was. I have decided not to replace the screen on my Kr

11-14-2011, 11:11 AM   #7
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Yep, really do recommend trying one. The process is easy, but you may need to go through it a couple of times to get the shimming perfect - as I recall I ended up not using shims at all. I think I followed someone's advice and put the tab on the other side stated in the instructions for perfect focussing. The screens are made from a very soft plastic and are easy to scratch or get smears of grease on so I used a pair of powderless examination gloves when I fitted mine, the whole process took less than twenty minutes.

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