View Full Version : [NBR] Teleconverters
Couch_Surfer
08-29-2007, 11:44 AM
Anyone running a teleconverter for more reach?
I know on the tech side of it, you lose a stop for the 1.4 and 2 stops for the 2X - but on a 2.8 70-200, that should mean you could push out to 400mm (4.0) in a somewhat affordable manner.
I'm thinking mainly for shooting wildlife - Brackendale Eagles in January come to mind. Just curious if anyone else has experimented with one and if it's a decent addition.
jbazett
08-29-2007, 11:51 AM
Anyone running a teleconverter for more reach?
I know on the tech side of it, you lose a stop for the 1.4 and 2 stops for the 2X - but on a 2.8 70-200, that should mean you could push out to 400mm (4.0) in a somewhat affordable manner.
I'm thinking mainly for shooting wildlife - Brackendale Eagles in January come to mind. Just curious if anyone else has experimented with one and if it's a decent addition.
f2.8 + 2 stops is f 5.6, Still not bad for a 400mm lens. Don't forget that You lose autofocus capabilities with the 2x as well.
Couch_Surfer
08-29-2007, 12:04 PM
f2.8 + 2 stops is f 5.6, Still not bad for a 400mm lens. Don't forget that You lose autofocus capabilities with the 2x as well.
Didn't realize you lose autofocus. I'm also assuming that a tripod would become pretty important out at that range.
jbazett
08-29-2007, 12:15 PM
Didn't realize you lose autofocus. I'm also assuming that a tripod would become pretty important out at that range.Totally, Hand holding a 400mm in 'less than ideal' light conditions can be pretty tricky. I use a 1.4x converter with my 200mm occasionally, Works pretty good, The price tag is a little heftier. If I owned a 70-200 f2.8 I would go for the 2x for sure especially if the lens had IS.
its not so much the loss of stops but the extra layers of glass you put in front of your lens...which soften and darken your images.
JSinclair
08-29-2007, 02:52 PM
yeah I have the 70-200 2.8 IS and I have the 2x tele.
The autofocus works fine, but is slower than normal. You loose 2 stops (5.6) and Ian is right the images are softer and darker by a bit.
I have it as a Jacknife in my bag just in case I need the extra reach. I have shot some surfing with it and it works in a pinch.
I would love to have a dedicated 400mm but that is down the road...you know when I am shooting the ASP Dream Tour...
Couch_Surfer
08-29-2007, 03:27 PM
I would love to have a dedicated 400mm but that is down the road...you know when I am shooting the ASP Dream Tour...
I thought everyone on this BB had one of these in their pack....
http://www.bhphotovideo.com/images/items/186152.jpg
BH has them in stock (http://www.bhphotovideo.com/c/product/186152-USA/Canon_2533A002_Telephoto_EF_400mm_f_2_8L.html) - only 6500 USD ;)
JSinclair
08-29-2007, 06:37 PM
I thought everyone on this BB had one of these in their pack....
http://www.bhphotovideo.com/images/items/186152.jpg
BH has them in stock (http://www.bhphotovideo.com/c/product/186152-USA/Canon_2533A002_Telephoto_EF_400mm_f_2_8L.html) - only 6500 USD ;)
Eventually, that's the one.
400mm 2.8 IS
:)
Happyness is a long lens.
b-man
08-29-2007, 09:10 PM
I've only had extensive experience with the 1.4x and 70-200 f/2.8L, but I can tell you that you'll be able to tell which shots had the converter and which did not. The background blur gets very harsh with the extender. I usually stop down 2/3, or even a full stop if the light permits. Sharpness increases greatly with stopping down.
Faithless
08-29-2007, 10:14 PM
You lost alot of sharpness with a 2x converter.
Best bet is a 1.4 (great) and Cropping in photoshop.
Faithless
08-29-2007, 10:15 PM
You lost alot of sharpness with a 2x converter.
Best bet is a 1.4 (great) and Cropping in photoshop.
JSinclair
08-29-2007, 10:41 PM
I dunno if I'd get a 1.4 with the 70-200mm. I would with a 300 or 400mm.
the reach advantage is negligible with a 1.4 on a 200mm. the extra 80mm you can probably walk into.
Faithless
08-30-2007, 04:46 AM
you don't lose as much light, and the quality is still almost the same. 2x, really degrades the image.
.243racer
08-30-2007, 07:12 AM
you don't lose as much light, and the quality is still almost the same. 2x, really degrades the image.
yes, but sometimes you have to actually TAKE the image.
vBulletin® v3.7.0 Release Candidate 2, Copyright ©2000-2008, Jelsoft Enterprises Ltd.