lmml 14/32
Posts: 2358
Joined: Tue Jan 30, 2001 2:27 am

Need A Good 600mm Zoom For My Canon

Mon Oct 06, 2003 4:35 am

I am presently using a 2x converter on my 300mm zoom. There are two problems with this combination: Auto Focusing and f-stop penalty. Can you suggest an inexpensive alternative with a Canon mount?
 
wietse
Posts: 3630
Joined: Thu Oct 18, 2001 12:49 am

RE: Need A Good 600mm Zoom For My Canon

Mon Oct 06, 2003 4:39 am

Nope..

either the 300mm F4L IS with a 2x convertor for about 2000 euros or go the Sigma way.

A straight 600mm lens is very expensive...

Wietse
Wietse de Graaf
 
ckw
Posts: 4586
Joined: Fri Aug 27, 2010 12:26 am

RE: Need A Good 600mm Zoom For My Canon

Mon Oct 06, 2003 4:43 am

Well you could go for the 300 f2.8 LIS - but hardly inexpensive. What you're looking for is a 600mm lens with an aperture of at least f5.6. Nobody makes these for less than the price of a car.

Cheers,

Colin
Colin K. Work, Pixstel
 
wietse
Posts: 3630
Joined: Thu Oct 18, 2001 12:49 am

RE: Need A Good 600mm Zoom For My Canon

Mon Oct 06, 2003 4:52 am

Or go check mirror lenses, but you will hardly find them below f8, and quality is very marginal...

Wietse
Wietse de Graaf
 
ckw
Posts: 4586
Joined: Fri Aug 27, 2010 12:26 am

RE: Need A Good 600mm Zoom For My Canon

Mon Oct 06, 2003 6:37 am

... and no AF

Cheers,

Colin
Colin K. Work, Pixstel
 
lmml 14/32
Posts: 2358
Joined: Tue Jan 30, 2001 2:27 am

RE: Need A Good 600mm Zoom For My Canon

Tue Oct 07, 2003 1:30 am

It's almost impossible then. Does anyone use a Canon 300mm with a 2x converter? I have trouble focusing. The only way to AF is to select either of the extreme focus points manually and pre focus on a point. It is impossible to us AF when pressing the trigger. The lens will just go hunting.
 
mirage
Posts: 3612
Joined: Mon May 31, 1999 4:44 am

RE: Need A Good 600mm Zoom For My Canon

Tue Oct 07, 2003 2:00 am

it's normal, I was using an EF 75-300 IS sometimes with the Canon 2x but it's like you said, lots of trouble, out of 10 photos maybe one satisfactory and never razor sharp images, always a compromisse between long range and average quality.

Luis
 
ckw
Posts: 4586
Joined: Fri Aug 27, 2010 12:26 am

RE: Need A Good 600mm Zoom For My Canon

Tue Oct 07, 2003 7:56 am

I use a 300mm f4 with 2x (and sometimes 2x & 1.4x convertors) and just use manual focus - at long focual lengths, I don't find manual focus too much of a problem as the difference between in focus and out of focus is readily apparent. Try using MF for a while - a little practice and you'll be fine.

Cheers,

Colin
Colin K. Work, Pixstel

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