BTW, many photographers will use what are called ” Prime ” lenses , meaning they only have one focal length like 50mm, or 105mm…no zoom.

Go here to read the rest:
Zoom Lens Magnification factor (X)

during outing with kids, do we have time to swap the lens, and risk missing candid moments – do we want to carry heavier one-for-all lens? – is performance or convenience more critical for us? Any lens can do a portrait, but Prime lens …

Excerpt from: 
Len(ii) Portraits with Prime Lens – Requirements and expectations …

There are basically two types of lens, zoom lens (a range of focal length) and prime lens (one focal length only). The Tamron 17-50mm is clearly a zoom lens. Being able to zoom in and out makes this lens my favourite walkaround lens.

Original post: 
Life goes on: Tools of the Trade

If you’re looking for better low-light performance you could get something like the EF 50mm f/1.8. It’s a very sharp lens and does well in low light.

View original post here:
What is the best lens to replace my canon 18-55 whitch came in a …

If you have a SLR or DSLR camera and other maker/mount lenses, the Fotodiox Mount Adapters allow you to use your lenses on the film/digital camera body. Sharing lenses has some distinct advantages

See original here:
Fotodiox Lens Mount Adapter, Canon FD Lens to MFT Micro 4/3 Four …

Just a short aside here – prime lenses , that is those lenses with only one focal length, tend to produce the very best image quality, typically much better than zoom lenses. Amazing Depth of Field. The plane of focus, being a macro lens …

See the rest here:
Tamron 60mm Macro Lens – Macro Lens Review | Sam Digital Photography

That said, given that the next steps are the Canon 70mm-200mm 2.8, which has clarity issues and is $1000 more, or the professional prime lenses (with their mega price tags), this is probably the best telephoto option that Canon offers …

Go here to read the rest: 
Fosters Blog » Blog Archive » Canon EF – Telephoto zoom lens – 70 …

No, it’s what’s called a prime lens . It only has one focal length. choufeizhu says: July 11, 2010 at 2:24 pm

Go here to read the rest:
Olympus Zuiko Digital 25mm lens review – J.F. Moore Photo Blog

Most lenses come with only one focal length. They are referred to as prime lenses

See the original post: 
Whats the purpose of different SLR camera lenses? | Slr Digital …

No, it’s what’s called a prime lens . It only has one focal length

See original here: 
Olympus Zuiko Digital 25mm lens review | Digital Camera Super Guide