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Forum: Pentax Camera and Field Accessories
06-28-2018, 02:22 PM
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What I have seen is that f/4 is fine - f/5.6 not great. The cliff you fall off in terms of light appears to be just past f/4 but there are those who say it is f/2.8 - I haven't used this screen. I used a KatzEye with split screen for a bit but mostly just gave up on manual focus.
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Forum: Pentax Camera and Field Accessories
06-28-2018, 06:11 AM
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It is important to note that only your Maximum F/stop matters unless you are using an M42 type lens or other lens without automatic aperture. Your f/2 lens at f/8 won't care. An 18-135 zoomed to 135 will look dark (since f/5.6 is the max aperture at that focal length) the same lens at 18mm probably will be fine (since max aperture is f/3.5 at 18mm).
The comments made earlier make it sound as though you were thinking this would impact any use of the lens beyond f/4.
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Forum: Pentax Camera and Field Accessories
06-25-2018, 08:24 PM
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Wow - A lot to respond to. First - I used to own the A* 85 f/1.4 which isn't the same as the lens you have but is similar enough I think to compare experiences. I also have really poor vision so there too we differ, my back doesn't normally give me much trouble but I know what it can feel like. I sold my A* 85 f/1.4 and bought the FA 77 f1.8 as a way of getting as close as I could to the A* experience from an AF lens. (The two are designed by the same designer and they have similar character in my opinon.)
I tried Live View, and I tried OVF, and I tried magnification, etc. I did NOT try a focusing screen replacement - although I did buy one with that in mind. The Live View was semi-successful but not overly so. Like you, I found a bit of awkwardness in live view. Overall I don't shoot super thin DOF portraits so I rarely see this problem anymore but I can remember it from the A* 85 days.
The OVF with Magnifier only works with central subjects. Maybe you should get a good Hoodman or something like that where you can treat the LCD as a viewfinder by holding that to your eye?
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