Can you determine if my contact lens (bifocal)prescription and my eyeglasses prescription are the "same" ? (links below) [more inside]
Looking for help with the optics in my from-scratch overhead projector! [more inside]
A neighbor showed me her deceased father's extensive collection of old camera lenses and doesn't have time to catalog, research, value and dispose of them. Apparently they number in the dozens (maybe more?). Would like to help guide her. Any thoughts welcome.
After years of mindless snapping, I'm finally improving my photography skills by taking my dSLR everywhere and taking more photos more mindfully. This has revealed two gaps in my gear, at least for what I'm focusing on right now: a cross-body camera strap that works for my body and a lens that I like with a focal length < 50mm. Details and requirements inside! [more inside]
My last two pairs of glasses have ended up with tiny spots on the lenses. Two different optometrists/opticians have said they don't know why. Do you? [more inside]
I'm trying to decide between a bunch of lens options, materials and index. Of course, I'd like to get the thinnest lens I can without spending more than I have to and crossing the line of diminishing returns. Surely it's possible to know exactly how thick a lens of a given material/index with a given prescription will be. Help me find out how to determine this. [more inside]
How do you read with progressive anti fatigue lenses? Please show me how. [more inside]
I'm getting my first pair of progressive glasses. I decided to go with Warby Parker rather than getting lenses from my local eye doctor because my doctor charged twice as much as Warby and I could not afford it. This is despite warnings from my doctor that progressive lenses must be measured in person. How will I know if the Warby Parker lenses aren't good enough? [more inside]
Is a lens fitting a requirement in California? If so, how much does one typically cost? [more inside]
I have two pairs of old glasses I really like, and want new lenses for them. Is there anywhere in Boston that will give me a good deal on them? Single vision, weak prescription, polycarbonate. I could probably be interested in adding the first AR option. Costco is not an option. Walmart is $79, but takes several weeks. Where is the best place to have my new prescription filled?
I'm looking at buying a used Pentax K5 II as my main camera rig. The most important use of this camera will be for documenting fieldwork, including photographing specimens in the field. I'd like to have a small selection of quality lenses that will cover me for most situations. I've been doing research, but there are so many options that it's hard for me to decide. Can you help me? [more inside]
Can someone explain these two types of zoom lens specs? [more inside]
I have a lovely little Lumix GF3. It has a 14mm lense. While I have great fun sticking the camera right in peoples faces to get a picture, I would like to get something a little more versatile. Ideally by buying inappropriate lenses from strange Chinese sites. [more inside]
What would be a good system/brand for lens filters without costing the earth? [more inside]
So, I have something of an eyewear fetish. And I'm looking or something new. And small. [more inside]
Save me from my glasses! I'd like to find the perfect contacts. [more inside]
I've decided it's time to upgrade from my Canon point and shoot. I'm going to get a Panasonic Lumix G5 DSLM. Now...what lenses should I get? [more inside]
On the prowl for the best "long-wear, comfortable" COLORED contact lense brand. Any recommendations?
On the prowl for the best "long-wear, comfortable" COLORED contact lense brand. Any recommendations? [more inside]
Photographers & photo enthusiasts: What is the best used wide angle lens I can get for a Canon 40D for under $100?
Photographers & photo enthusiasts: What is the best used wide angle lens I can get for a Canon 40D for under $100? [more inside]
I need help valuing and perhaps selling some IMAX projector lenses and power supplies. [more inside]
Explain Ebay to me like I'm six years old. I need to sell some expensive lenses and a camera. How do I sell something without being taken to the cleaners by scammers? [more inside]
Is there somewhere online that I can order prescription contact lenses from without a optometrist's confirmation? [more inside]
Please suggest a Canon lens for a trip to Yellowstone. Long story. [more inside]
John Carey uses an old Olympus 55mm 1.8 lens on his Canon 5D with beautiful results. Which other similar old lenses have you found great on a Canon EOS mount?
I am considering changing from contact lenses that last one month to daily disposable lenses. Is there anything that I should know? Looking for pros and cons, particularly from anyone who has made this switch. [more inside]
What are the most comfortable soft, disposable contact lenses out there? [more inside]
My annual eye exam is coming up. I've had a years-long string of not-quite-right corrective lenses. What can I do to get an accurate prescription this time? [more inside]
I want to try out contact lenses again. [more inside]
Is there any kind of market for used Contax SLR equipment? [more inside]
I ordered new glasses online. I've been wearing them for 4 days and they still seem "off" a little. How long did it take you to get used to new glasses? Is something wrong with these? [more inside]
Budget lens for my Canon Rebel T2i? [more inside]
Why are microscope lenses small and camera lenses large? Surely having large lenses on microscopes would let you gather more light from the thing you're trying to examine and give you a clearer picture.
Would it be possible to make a telescope from two contact lenses? [more inside]
I need new glasses *and* new sunglasses. Help me understand the possibilities and figure out the best combination. [more inside]
I have Ciba vision Air Optix Aqua 1 month disposable contact lenses and have mixed them up. I use -1.75 for my left eye and -1.50 for my right, 8.6/14.20 size. On the actual lens of one of them it says "CIBA x647" and on the other "CIBA x648", which lens is for which eye?
Best colored annual-replace contact lenses? [more inside]
What combination of lenses should I buy for my new Oakley Flak Jackets, for year-round cycle commuting? [more inside]
Should I try contact lenses again? What brand/style? [more inside]
Do computer glasses work? Where can I find a company that will fit a pair of frames with eyestrain lenses? [more inside]
Why can't I see clearly through eyeglasses? [more inside]
In this question I asked you to help me become an Inspector Gadget filmmaker. You succeeded. Well, now I want you to help me pimp my camera. (budget around $15,000) [more inside]
Doc says my 2 yr. old needs strong (+4.5-5.5) glasses. Doc #2 says +1.5 glasses. Kid sees perfectly fine... random MeFi strangers, help! [more inside]
Sigma 18-125mm f/3.8-5.6 AF DC OS HSM vs. Canon EF-S 15-85mm f/3.5-5.6 IS USM, besides the obvious zoom range differences is the Canon really worth twice the Sigma? I've checked a number of reviews and it doesn't look like the Canon's advantage is as clear cut as the price would suggest.
The internet has solved the problem of cheap glasses + lenses bought together. How about putting lenses in glasses? [more inside]
What are your favorite prime lenses for a Canon EOS body? [more inside]
Taking my t2i on the ski slopes. Tips? [more inside]
Attention glasses/contacts wearers! Do you have a major difference in the prescription between one eye and the other, aka anisometropia? Have you found any benefit from iseikonic lenses? [more inside]
About ten years ago, I was given a couple Pentax 35mm film SLR bodies, and some lenses, which I was happy with. Especially the SMC-M 50mm f/1.4 lens, with which I discovered bokeh and existing-light photography. But after a while, I got tired of having to store and process film, since I just put all the pictures into my computer anyway. So I got a *ist DS, since that was compatible with all my lenses. But my favorite prime lens has been turned into a zoom by the reduced sensor size. The closest equivalent I've found is the FA 31mm Limited, but that costs ~$1000 USD, and its not even f1.4, its f1.8. Given this issue, along with the fussiness of getting all the auto-exposure/focus stuff to work the way I want it to, and I'm really missing my film camera bodies. Or is there an alternative? [more inside]
Does saline solution in an aerosol can still exist anymore? Can I just not find it anywhere? [more inside]
Can I get contacts if I have presbyopia (needing progressives) AND astigmatism? [more inside]