Join for FREE
It only takes a minute!

Welcome to BirdForum.
BirdForum is the net's largest birding community, dedicated to wild birds and birding, and is absolutely FREE! You are most welcome to register for an account, which allows you to take part in lively discussions in the forum, post your pictures in the gallery and more.

Reply
 
Thread Tools Rate Thread
Old Friday 14th December 2007, 02:45   #1
steveo
King Midas in reverse
 
steveo's Avatar

 
Join Date: Dec 2005
Location: Hingham Ma.
Posts: 1,664
telecon advice?

I have a sigma 170-500 1.5-6.3apodg is there a teleconverter that is good for this lense and also what is a teleconsomething excatly?
steveo is offline  
Reply With Quote
Old Friday 14th December 2007, 08:11   #2
postcardcv
Super Moderator
 
postcardcv's Avatar

 
Join Date: Aug 2003
Location: Norfolk
Posts: 16,663
With an slr a tc (teleconverter) go between the camera and the lens, basically they increase the effective focal length of the lens you're using. The commenest sizes are 1.4x and 2x, a 1.4x will cost you one stop of light and a 2x will cost you two. TCs tend to have a slight negative effect on image quality, though this will vary depending on the lens used, a 1.4x is normally the prefered option. With your lens you will loose auto focus with either size so you'll get a longer focal length, less light gathering and be left with manual focus.
postcardcv is offline  
Reply With Quote
BF Supporter 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014
Click here to Support BirdForum
Advertisement
Reply


Thread Tools
Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is Off
HTML code is Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Olympus TCON-17 1.7x Telecon lens helenol Olympus 8 Saturday 16th August 2008 17:30
Advice please motoman Zeiss 7 Saturday 22nd September 2007 16:02
In a need of advice - 400/5,6L vs 300/4 IS L x 1,4 IvoZafirov Canon 16 Friday 8th September 2006 10:50
Advice please. pauco Nikon 6 Thursday 4th December 2003 21:53
Thanks for advice... iebirdie Binoculars 1 Wednesday 22nd October 2003 18:09

{googleads}

Fatbirder's Top 1000 Birding Websites

Search the net with ask.com
Help support BirdForum
Ask.com and get

Page generated in 0.14431190 seconds with 11 queries
All times are GMT. The time now is 14:38.