I had a canon demi over 40 years ago. So long ago that I really don't remember the detail of the focussing. But it was only a 28mm lens and for that short a focal length then the figures for in focus using a CoC of 0.03 are:
for focussed at 2.0m
f2.8 1.65m to 2.54m
f4.0 1.54m to 2.87m
f5.6 1.4m to 3.46m
f8.0 1.25m to 5.05m
f11 1.1m to 11.7m
for focussed at 10.0m
f2.8 4.84m to infinity
f4.0 3.96m to infinity
f5.6 3.19m to infinity
f8.0 2.47m to infinity
f11 1.92m to infinity
given the depth of field figures for a 28mm lens, you can more less just use zone focussing and be there unless you are photographing stuff close up.
So whether you would need a dioptre is debateable. I don't even know if such a thing existed which could be fitted to eyepiece.
The camera I had produced excellent colour quality and very sharp images on slides.
Although I need reading glasses to see the f-stop, shutter and focus numbers, I can see clearly through the finder of my Olympus Pen-S without my spectacles. Likewise, the Canon Demi has a nice bright viewfinder that causes me no problems. The Olympus Pen F/FT reflex viewfinder is also fine without correction. I've never heard of any diopters for these cameras.
On the other hand, the viewfinder image in my Mercury II half-frame is quite fuzzy unless I wear my readers.
I use a -3 on my SLR + my glasses, so naturally I was wondering. I'd like to buy one of those small cameras for fun, could be nice to bring in family events or when I'm with friends. I don't know yet which model I'll pick, there's the Demi, Pen EE, Minolta Repo, Konica Eye, Mamiya Mimi, Fuji Half, Chaika III etc etc
use whichever speed film you feel comfortable with. If negative then how big do you intend to enlarge?
With colour neg film I think 400 speed will be fine. With B&W neg film 400 is OK if you use tgrain such as delta 400 or T-Max and you may prefer a bit more grain anyway. We don't know.
If focussing is an issue for you and you just want as much DoF as possible then 400 Speed film will allow you smaller apertures so you can just use zone focussing. providing you don't want to print 20x16s I think you'll be fine. If you want absolute minimal grain then 100 or slower film speed.
I use a -3 on my SLR + my glasses, so naturally I was wondering. I'd like to buy one of those small cameras for fun, could be nice to bring in family events or when I'm with friends. I don't know yet which model I'll pick, there's the Demi, Pen EE, Minolta Repo, Konica Eye, Mamiya Mimi, Fuji Half, Chaika III etc etc
I've shot with the Pen EES, Pen EES2, and Pen D. The sharpness of the EES/EES2 lenses were merely okay, despite having four elements (Tessar clones). But the Pen D was noticeably sharper.
At one event, I shot with both an EES and Petri 2.8, and while the EES sharpness didn't look bad, the Petri was clearly sharper.
On a related topic, I find that half-frame causes me to shoot in what I call "digital mode", in which I shoot freely as if I had unlimited shots on the roll. Quantity goes up, and quality goes down.
On a related topic, I find that half-frame causes me to shoot in what I call "digital mode", in which I shoot freely as if I had unlimited shots on the roll. Quantity goes up, and quality goes down.
I have a beautiful shot taken over 30 years ago on Kodak 400 print film. It looks great at 5x7 and would no doubt be fine at 8x10. Olympus extensively addressed the "enlargement problem" when they marketed the Pen's in the '60's. The 4x3 aspect ration requires much less cropping than the 3x2 of a full frame 35mm.