good night this type of lens can be used for Optical Prescription?
632346
Yes, If you pick up a pair and have prescription lens made they are pretty cool.
632347
yes, but you must consider that the oval of the lens is small, if you want to do progressive lens.
1739980
I actually switched the lenses to the clear set that came with it. They are pretty dark, so vision would be limited on a dark night. I use them for my steampunk costume and they look great with some added loupes and gears glued on.
1429331
Yes, I have used this lens for all of those purposes and it performs well. Although you might want the faster f2.8 lens if the indoor performances don't have adequate lighting. I have not regretted buying this lens at all.
291039
Yes but there is different power lenses. A 10 X 50mm lets in more light in then a 10 X 42mm both are good but at dusk or dawn more light is better. I bought the 12 X 50mm.
2221602
Yup. It's a daylight optic. Good light gathering thru dusk. Not for total darkness.
357724
To answer your question I think this is an excellent Lens and it would work really good as a general/every day walk around lens.
442193
Yes! This is one of the best lens for that. Not many lenses has such a large aperture. You'll get amazing bokeh guaranteed.
561736
There are several courses on low light photography on line (You-tube) along with numerous books that can answer your question. Suffice it to say I take photographs with this lens at night successfully. Your milage may very according to your particular skill set and tools available tripod, flashlight, cable release etc. Excellent lens for a Canon 5D Marl III even at ISO 1600. I have no problem with sharpness in my photos.
350251
One more thing, unless you have excellent light collection, I'd be careful. Both of these lenses absorb some light, and at maximum magnification the image may be too dark.
621855
I just got this lens but so far it seem good for general purpose photography. It helps to use a smaller aperture for wider depth of field.
609601
In medical uses I really don't know, but you can take very close images of anything. This lens is good because it's a clear one (f/2.8) and you don't need to be very close to your object. I've taken an image of a rice grain. See link below. https://www.facebook.com/photo.php?fbid=751473798233418&l=374329c48f Hope it helps you.
1347624
Can be used for full frame and crop sensorReview at http://www.dyxum.com/lenses/Samyang-85mm-F1.4-Aspherical-IF_lens554.html
2236917
The aperture is 3.5 at 24mm and 5.6 when zooming. It's good for daylight but at night you have to have a steady hand or tripod/monopod since it doesn't let in that much light in full zoom. It's a good lens for the money and helps as an all around lens.
1320532
Yes...any lens 9mm or higher will be great fir terrestial viewing as long as you have an erecting lens...good luck
1549359
I would go with a more versatile lens for low light performances. Maybe a 70-200 or something similar.
842337
I used this lens to take some full moon snow covered landscape photos and found the 16mm limit a little short to get a good image of the moon included (at 16mm moon is less than .2mm on sensor). But I did get some very good landscape images under only moonlight. It is a really good lens, great glass in the one I have and a good value. However it really is a full time wide angle lens. I do want to do star trails with it, expect good results based on what I have used it for in the past. It's -7F tonight so that wont be happening soon...
2131313
I bought this lens just for that purpose. Takes excellent photos, even with the 2x converter. That is the setup I use with my Nikon D7000 for my Son's lacrosse games. Obviously does very well on sunny days. No regrets!