mertonia
old hand
Reged: 21/08/2006
Posts: 744
Loc: locked away
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Hello
I have been away from the forum for a while so excuse me just to pop by and ask a question.
I have noticed that my eyesight has begun to deteriorate which in turn is impacting on the sharpness of my images. I guess i need to adjust the dioptric thingy but i am not sure how. BTW the camera is a GS1
thankyou for any suggestions.
peter
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'I only use a camera like I use a toothbrush. It does the job'
Don McCullin. The Destruction Business
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zx9
Pooh-Bah
Reged: 22/06/2007
Posts: 1875
Loc: London
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Hi Peter.
With the WLF you need to unscrew the bezel around the 'dioptre' and replace with one of the correct strength.
IIRC If you are using a prism the 'dioptre' fits over the original eyepiece in the same way an eyecup would be attached though I am a bit hazy on the prism, it's been a long time since I handled one.
Hope that helps.
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Regards,
ZX9 (Keith Hudson)
My Flickr
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mertonia
old hand
Reged: 21/08/2006
Posts: 744
Loc: locked away
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Keith
i thought i had replied to your post but not sure where it went!
thanks for your advice, but i have a stupid question...
how do i know what strength to purchase?
peter
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'I only use a camera like I use a toothbrush. It does the job'
Don McCullin. The Destruction Business
Edited by mertonia (01/03/2009 22:07)
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Malcolm_Stewart
Carpal \'Tunnel
Reged: 11/07/2005
Posts: 4460
Loc: Milton Keynes, UK
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I know nothing about Bronicas, but in the 35mm SLR arena different manufacturers used different ways of defining the dioptre strength. Some labelled the dioptre correction lenses with the figure which your optician could advise from your most recent spectacle prescription; others took in to account that the viewfinder image was normally set at about 1-2m away.
The most helpful had a set of correction lenses on a slide which could quickly tell you what was best for your eyes at that time - but where will you find that quality and depth of service these days?
Nowadays, most DSLRs I've used have a built-in and adjustable correction feature.
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Malcolm Stewart
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Rhys
Sasquatch
Reged: 15/01/2004
Posts: 4049
Loc: York (home of the speedbump)
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Quote:
how do i know what strength to purchase?
peter
Maybe go into Superdrug etc. and try on some reading glasses until you find some that are just right then see what dioptre they are. That should give you an idea I hope.
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BSRIPN (Officially full of it..)
RGMP.co.uk (My Website.. getting there at last.)
Benchinistas.org.uk The home of Benchism
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mertonia
old hand
Reged: 21/08/2006
Posts: 744
Loc: locked away
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thanks for your help with this
much appreciated
peter
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'I only use a camera like I use a toothbrush. It does the job'
Don McCullin. The Destruction Business
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Wheelu
addict
Reged: 31/10/2007
Posts: 568
Loc: UK, up North
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I have the same problem so did a Net search to see what is out there: -
"Are you CERTAIN that you need this strength? the reason I ask is that person with NORMAL vision has a standard eyepiece strength which has a diopter value of -1.5 dipters, so corrections to that are NOT the same as buying a vision correction lens in the drugstore for reading!
Eyepieces for the ETRS prism finder were -4.5, -3.5, -2.5, -0.5, +0.5 and +1.5, so you would buy a +0.5 only if your vision required that a +2.0 diopter correct were need (-1.5 standard + 2.0 correction = 0.5 eyepiece)"
The poster was called Wilt and the forum PhotoKB, 15-1-2006
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