akk2
Established
Hi, I am currently using a -3 diopter on my R2A and RD1s. Which one should I go for ? -2 or -3? because the Leica have -0.5 built-in and don't have a option for -2.5
ampguy
Veteran
I use the same
I use the same
value for on my film Nikons, RD1, film Leicas, and M8 and wouldn't want to go stronger or weaker on any.
I use the same
value for on my film Nikons, RD1, film Leicas, and M8 and wouldn't want to go stronger or weaker on any.
akk2
Established
Which mean i will need a -3 ? if i am using -3 on RD1s?
jaapv
RFF Sponsoring Member.
Only one way to find out. Go to the optician and hold his try-out lenses for -2.0 and -3.0 in front of the ocular. Or splurge Euros and buy both (not recommended
)
)
ampguy
Veteran
in my experience
in my experience
if you like to focus accurately, and see clearly through the Leica film and digital, Nikon SLR film (F3), and RD1, then the same value diopter works for me for all of those.
Check with your eye doctor to verify if that's also best for you.
in my experience
if you like to focus accurately, and see clearly through the Leica film and digital, Nikon SLR film (F3), and RD1, then the same value diopter works for me for all of those.
Check with your eye doctor to verify if that's also best for you.
john_s
Well-known
Every camera viewfinder system has some value built in. Most opticians will not have much knowledge of that, so they might not be able to advise you of the optimum for you. Leica diopters are available in 0.5 increments. Is it only Leica that understands that this is necessary for some customers?
Given the price of Leica diopters, you don't want to get it wrong. The best solution is to go to a shop that has the range, and try the values around your value.
The next best is to buy from a shop that will allow exchange if the value is unsuitable. That is more difficult because it's a bit harder to make the comparisons.
What is your optical prescription for distance?
jaapv
RFF Sponsoring Member.
He should not let the optician advise, he should look through the lenses and decide. The onlydiopter steps are 0.5,1.0,1.5,2.0 and 3.0. So there is no 2.5
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akk2
Established
Thank you for replying. I would get to a Local store when I get my M9, (40days+, still waiting).
john_s
Well-known
Thanks Jaap, I was not aware of the absence of -2.5.
In trying out the diopters, I think it best to view them on the camera in ambient light that is not very bright, and try focusing on objects at various distances. Personally I find the portrait distance range the most important as far as getting the diopter right.
Ming Rider
Film, the next evolution.
Do what I did.
Went to Specsavers (yes, really) and asked the Optician for my prescription, which was -1 on my sighting eye. So i say to Optician, "does that mean that as the camera is -0.5 and my eye is -1, do I need a -0.5 or a -1.
She began by saying that it was confusing, then started crying. Somewhat confused myself, I was strangely asked to leave.
I won't say anything about time-of-the-month or hormones . . . Oops, I just did.
Went to Specsavers (yes, really) and asked the Optician for my prescription, which was -1 on my sighting eye. So i say to Optician, "does that mean that as the camera is -0.5 and my eye is -1, do I need a -0.5 or a -1.
She began by saying that it was confusing, then started crying. Somewhat confused myself, I was strangely asked to leave.
I won't say anything about time-of-the-month or hormones . . . Oops, I just did.
jaapv
RFF Sponsoring Member.
I wasn't aware that Specsavers employed opticians. I thought they got their staff from the same labor pool Sainsbury's uses for their replenishing staff....Do what I did.
Went to Specsavers (yes, really) and asked the Optician for my prescription, which was -1 on my sighting eye. So i say to Optician, "does that mean that as the camera is -0.5 and my eye is -1, do I need a -0.5 or a -1.
She began by saying that it was confusing, then started crying. Somewhat confused myself, I was strangely asked to leave.
I won't say anything about time-of-the-month or hormones . . . Oops, I just did.
thejameskendall
Established
Does anyone know any shops in the south of England - I guess London - that has the range of diopters?
1joel1
Well-known
-3 for sure.
Rangefinderfreak
Well-known
I bought from ebay -0,5 leitz diopter lens, it worked beautifully on my leica M8 and Nikon F where I just used it to try by hand holding. Then I bought a generic -0,5 diopter lens for Nikon. It was really bad, nowhere the leitz correction. It just says, beware and test for yourself
kbg32
neo-romanticist
Easiest thing to do - go to a shop that sells reading glasses. We have .99 stores and pharmacies here in the States that sell over the counter reading glasses. Try a pair of -2 and -3 glasses and figure out which works best.
Dralowid
Michael
Classic camera, Pied Bull Yard, normally has them in stock. I've lost two (and one magnifier so have rather given up with them
zuiko85
Veteran
Keith, I have never seen negative diopter reading glasses at any store. They are all plus diopter.
awilder
Alan Wilder
You need to find out from your optician or eye doctor the actual prescription and base it on that. If by chance you are using a Nikon -3D on the Cosina, the actual power of that diopter correction is -2 diopters since Nikon labels their diopter lenses as a net total with -1 diopter included from the optical power of their prism finders. Therefore, their labeling of their diopter lenses represents the total power of the system ( for example -3D Nikon diopter is -2 actual diopter power plus -1 of the finder = -3D labeling).
