Free Shipping on ALL Products
camera reviewsbest cameraslens reviewsphotography tipscamera forumvideo toursphotography bookssupport me
It is currently Sun Aug 31, 2014 1:02 am

All times are UTC




Post new topic Reply to topic  [ 3 posts ] 
Author Message
 Post subject: Lens question
PostPosted: Thu May 24, 2007 12:05 pm 
I seen some powerful lens like 300-800mm, and i also seen lenses that just say 800mm 5.6 EX DG APO, i just wanted to know if a 800mm is powerful and why doesnt it say for example 600-800?


Top
  
 
 Post subject:
PostPosted: Thu May 24, 2007 12:25 pm 
Offline
Moderator

Joined: Tue Nov 21, 2006 10:13 am
Posts: 379
Location: Sale, UK
A 300-800mm lens is a zoom lens that can operate anywhere between those two focus lengths. An 800mm lens is known as a prime lens. That means it operates at just one focal length. Prime lenses are optimised for a single focal length. This means they usually have better image quality compared with a zoom lens at the same focal length.

Prime lenses are also typically able to offer a wider aperture at a specific focal length compared with a zoom lens. For example, at 50mm my 18-70mm lens has a much smaller minimum aperture than my 50mm f/1.8 prime lens does.

_________________
Nikon D80, Nikkor lenses: 35mm f1.8 G AF-S DX, 50mm f/1.8 AF D, 18-70mm f/3.5-4.5G ED-IF AF-S DX, 70-300mm f/4.5-5.6G IF-ED AF-S VR, SB800 flash
My photos on SmugMug


Top
 Profile  
 
 Post subject:
PostPosted: Thu May 24, 2007 1:30 pm 
oh ok.


Top
  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 3 posts ] 

All times are UTC


Who is online

Users browsing this forum: Yahoo [Bot] and 1 guest


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum

Search for:
Jump to:  

All words, images, videos and layout, copyright 2005-2012 Gordon Laing. May not be used without permission.
/ How we test / Best Cameras / Advertising / Camera reviews / Supporting Camera Labs

Webdesign by Alphabase IT
Powered by phpBB® Forum Software © phpBB Group