Originally posted by richard0170 As a happy owner of both the K3 and KP, and fortunate to have many legacy MF lenses in addition to modern AF primes, I have decided to insert a split image K3 screen from Focusing Screen .com into either the K3 or KP, probably the K3. Before I go ahead and order one though I would like some feedback about using the screen with slower lenses. My most used MF lenses are the K 50mm f4 Macro, M 100 f4 Macro and K 28mm f 3.5. Many (but not all) older film cameras would have the split image black out at f4, will the newer K3 screen suffer the same issues, and if so might there be a better choice?
Any advice would be most welcome.
I recently got back into photography (circa October 1919) after leaving it altogether back in the very early 1980s while still in film photography.
I started out with the Pentax K2, which had a microprism focusing screen. I found this almost never let me down, even when hand-holding an F5.6 400mm lens with a shoulder brace, shooting model aeroplanes (and the occasional bird) in flight. When, while twisting the focus ring of whatever lens I was using, the "bubbles" in the microprism suddenly "popped" clear, I knew I had focus, and could click.
When my K2 was stolen, and I tried to replace it, I found it was out of production, and I had to buy a Pentax ME (after which, of course the Pentax ME Super came out - grrrrr!). The ME unfortunately came with a split screen focusing system. I never completely got used to it. Often, one of the half-circles around the split would go black, and if too much of the content I was trying capture had vertical instead of horizontal lines - or was a flat surface without lines, the split screen left me stranded.
Now that I have gone digital (first a K50, now, joyfully, a KP), and even with the 1.2 viewfinder magnifier, I found I rarely achieve spot-on focus with my old legacy manual lenses. This is more so with the 135mm F3.5 and the 200mm F4. Not so bad with the 28mm 2.8 , the 50mm Macro F4, and the 85mm F2. As a result, I rarely use them, which is sad, because they were good lenses, and were part of the reason I returned to Pentax when I returned to photography.
But the main point of all this rant - if you are going to take the (financial) gamble on a focusing screen, I would seriously suggest you consider the focusingscreen.com EC-A microprism focusing screen.
Focusing Screen
Not that I have tried it, but I believe it has been tried by other pentax forum members on other pentax dslr cameras. When I first realized my problems with manual focus, I did a fair bit of "search" through the forums - and I suggest you use the forum search functions too, to check out the viewpoints and experiences of other members.
Why haven't I followed my own recommendation? Mainly financial - I am a 76 yr old pensioner with limited funds, and no experience of meddling with the insides of camera old or new, so I would not only have to buy the focusing screen, but pay someone reliable to install it.
OK - you have my 2c worth. In truth, I am very interested in this topic - I have read, searched, and re-searched, and posted, on it on more than one occasion in these forums. so would be most interested in other people's reactions to this point of view. And also, much interested to see if you take the leap, and if so, which way you go, and your assessment of the success or otherwise of your choice.
My only other comment - I did recently mount my 135mm manual lens, and switched on "catch in focus" just to see how well that would work. I only tried it in-doors, in relatively low light, so not a truly fair trial, but I got some respectable results. But trying to hold the camera still, while trying to twist the focusing ring smoothly while holding down the shutter button had its challenges