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04-30-2012, 04:48 PM   #1
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Diopter Adjustment

Ok, here is an obscure question.

I wear a -5 diopter contact lens in my right eye.
Most of the time, I wear glasses.
Sometimes, especially in humid conditions, I have to take pictures by flipping my glasses up as they fog up from being close to the camera and the humidity.

The K5 doesn't adjust enough when I move the diopter adjustment to the Right - which says " - " on the slider.

In the K5 manual (page 61) it says, that I can adjust the diopter -2.5 to 1.5.
It also says that if that's not enough, that I need to buy the correction lens adapter.

So what is the consenus? Should I get a -5 or -4 or -3?

04-30-2012, 05:03 PM   #2
dms
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A question that perhaps you should ask is how convenient is it to switch between glasses and glasses, off much of the time.

I have a diopter for my Nikon FM2, and except for unhurried landscapes and macro I find removing my glasses for each shot to be a major pain. I suggest you ask your optometrist if there is a diopter that would allow you to use the camera adjustment (one extreme) to allow you to use glasses + diopter, and still use the camera adjust (other extreme) + diopter w/o glasses.

If it is not feasible--maybe a drop down (hinged) diopter (like some 2x magnifiers). As far as the diopter strength (your question) I believe Pentax should be able to tell you the effective (camera) system diopter value and thus what the eyepiece should be.
04-30-2012, 06:26 PM   #3
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QuoteOriginally posted by dms Quote
A question that perhaps you should ask is how convenient is it to switch between glasses and glasses, off much of the time.

I have a diopter for my Nikon FM2, and except for unhurried landscapes and macro I find removing my glasses for each shot to be a major pain. I suggest you ask your optometrist if there is a diopter that would allow you to use the camera adjustment (one extreme) to allow you to use glasses + diopter, and still use the camera adjust (other extreme) + diopter w/o glasses.

If it is not feasible--maybe a drop down (hinged) diopter (like some 2x magnifiers). As far as the diopter strength (your question) I believe Pentax should be able to tell you the effective (camera) system diopter value and thus what the eyepiece should be.
Good points. There are the occasional times I *need* to use my naked eye. I have the Ref-converters - as for additional diopter adjustment - but they too, fog up with my glasses in those special/humid times.

Since I wear my glasses 99% of the time, I would put the diopter corrector in my kit to be available for those special times. That is my plan.
04-30-2012, 08:42 PM   #4
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You should check with your optometrist as to whether your glasses prescription is the same as the contact lens. I wear -8 on the left and -8.5 on the right (contact lenses), but my glasses are around -9 to -10.

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