Is a lens fitting a requirement in California? If so, how much does one typically cost? [more inside]
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]
Save me from my glasses! I'd like to find the perfect contacts. [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]
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.
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.
I'm a zoom junkie. What do I do with a 17mm lens? [more inside]
Suggest online or DVD resources for a new filmmaker to learn about lenses, film formats, shot composition, camera moves, dialogue staging, and other aspects of cinematography & directing? [more inside]
What are the technical obstacles to making 'smart' spectacles which would function like the lenses in the human eye? [more inside]
I'm heading to the States in a month, and would like to pick up some Canon EF lenses for my film body (now) and DSLR (later). Interests and budget are after the jump. [more inside]
What's your favorite Nikon-compatible macro lens? I'm completely new to macro photography (and still pretty new to photography in general, having purchased my first DSLR a little over a year ago), and I'm leaning towards the Nikon 60mm f/2.8D AF, largely because of the price differential between this and some of the other Nikkor macros. Anyone have any great experience with some of the makeshift macro lenses (using extension tubes, reversing rings, etc)?
Prospective DSLR user ISO decent budget lenses for shooting babies, beautiful scenery, (and maybe) blooms. [more inside]
I'm going to be purchasing a DSLR camera, and am looking for some input on which lens(es) to purchase. [more inside]
I'm interested in fitting odd lenses -- and making custom lenses -- to/for digital cameras and digital video cameras. I'm not terribly concerned with the electronic side of things, so you shouldn't be either. What I'm looking for is a crass/crash course in optics -- something (a book, a video, a class, a kit) that will teach me the basics of optics and allow me to force photocopier lenses, telescopes, and microscopes onto unsuspecting recording devices.
This is a two part question: Which every day lens should I buy for my dSLR, and what other camera accessories should I get? There is [more inside]
I want to take my photography to the next level. What should I invest in? [more inside]
I'm looking for a new digital SLR that I can use with my existing lenses, which works well in general and low-light situations... [more inside]