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EVF Confusion - Hard to Focus?

A

ATF

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Hello,

Maybe it's time to visit the eye doctor. I just received my EVF and am finding it very hard to focus the diopter. With my glasses on or off, you can get close but everything seems to slightly blur.

Anyone notice when you glance left or right with the eye looking in the viewfinder you catch a RGB "ghost" as well. Like seeing the three layers pulled apart for a very brief moment. Makes for an odd effect. Gives me a headache.

I can't imagine using my LCD for a viewfinder, but at the moment it's a lot easier. Weird.

Maybe I'll try some eye drops and see if that helps.

... and something for my headache.

Best!

ATF

EDIT: Holy crap. After I posted that I had the most intense Deja Vu.
 
You will see RGB flashes because that's how the EVF forms the image. You will get used to it. Pretend you're still in college and it's a flashback :-)

The EVF is much easier to look at if you choose:
System - Monitor - EVF refresh - Fixed

and

Video - Viewfinder - Open Gate - ON
 
If you are having an issue focusing without your glasses, it may be that you need correction for an astigmatism. Your eye may focus horizontals differently than it focuses verticals. Sounds crazy I know, but you should ask your opthamologist. You can get a corrective lens that can be inserted into the viewfinder to correct this for you. Don't recall if the RED viewfinder has a threaded screw-in spot for a corrective lens, but this is a fairly common feature and even if it does not screw in you can have the outermost lens removed and replaced with a corrective one. You may want to consult with RED support first to find the best way to have this done for your viewfinder.
 
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Hello,

Thanks for the info, Mitch. This is the first time I've ever noticed problems to this extent. Although using my Canon 1ds MKIII has become more difficult of late as well.

I had planned on a visit soon. My eyes usually have issues with things in the distance, but even seeing up close is more difficult in the last year.

A few years ago I was assaulted by five guys outside my apartment and one broke the bone above my left eye, which is the one I use for shooting pictures (the right eye for the rifles). Never seemed to be much of a problem except for the last six months. I'm even using eye drops now, which I never did before.

Thanks for the additional info on the RGB flashes, Crew! Haha.. I'll set it to fixed refresh and "see" how that helps. Nyuk nyuk.

Thanks again!

ATF
 
color fringing on evf

color fringing on evf

I've looked at about a dozen EVFs and the varied from acceptable to severly strenuous on the eye. IMHO there is a problem with both the design and the workmanship. The design flow results in slight discoloration but some added missallignment will make it quite difficult to see snappy focus and after a while puts too much strain on the eye. I've been able to cure some of the misallignment issues for my customers but it's anyone's guess what your unit is like.
Jacek Zakowicz, OptiTek
 
Mitch Gross said:
If you are having an issue focusing without your glasses, it may be that you need correction for an astigmatism. Your eye may focus horizontals differently than it focuses verticals. Sounds crazy I know, but you should ask your opthamologist. You can get a corrective lens that can be inserted into the viewfinder to correct this for you. Don't recall if the RED viewfinder has a threaded screw-in spot for a corrective lens, but this is a fairly common feature and even if it does not screw in you can have the outermost lens removed and replaced with a corrective one. You may want to consult with RED support first to find the best way to have this done for your viewfinder.
Click to expand...


Mitch is right. Another alternative is to just have you opto make a monocle for you. Then you can attach and remove it from the eyepiece with a couple little tabs of velcro. Make sure you measure the inside diameter of the eyepiece before you have the glass made.

I use this method myself and have had much success with it on both the Red and other 35mm cameras.

Regards,
Danny
 
Something that may be worth mentioning here, in coming from a naval background, is that you should adjust diopter on viewfinders (and binoculars) by letting your eyes "relax" to focus on infinity, then adjust the diopter until things snap into focus at that range without you trying to focus on the screen itself. With the EVF, try keeping both eyes open and focused on something in the distance, then bring the EVF into focus alongside it.

Same way Head Up Displays are set - the reticles appear to float over the target in the distance when your eyes are focused there. :)

HTH

Paul

P.S. A side benefit is that your eyes don't have to work as hard to maintain or change focus all the time between looking into the viewfinder and at the real world.
 
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