Shake reduction?

Rhys · #1 08-27-2006, 05:40 PM

How long is the longest lens the recommend for use with shake reduction?

I heard from somebody that Canon weren't planning it because on lenses of 300mm the distance the sensor would have to be moved is about 1 centimeter.

Rex914 · #2 08-27-2006, 05:47 PM

Rhys is referring to Canon's explanation inside this White Paper. Scroll down to the part where it discusses in-body IS versus lens IS.

I'm interested in knowing just how effective this technology is in practice for a variety of focal lengths. While it would be overly optimistic to expect any major advantages with say, a Bigma

, how about the average 70-300 f/4-5.6 consumer telephoto lens, an 80-400 type of lens, or even a Sigma 70-200/2.8?

jeisner · #3 08-27-2006, 05:56 PM

It is consistantly effective with my F*300mm f4.5... in my estimation it gives me a good 3 stops..

Thats the longest lens I have though...

If I get home early enough tonight (still light) I can do some comparisons with SR on and off with the 300 if you like? I could also use the Tamron 1.4x on that to give you 420mm

Rex914 · #4 08-27-2006, 06:06 PM

Quote:

Originally Posted by jeisner

I can do some comparisons with SR on and off with the 300 if you like? I could also use the Tamron 1.4x on that to give you 420mm

Sounds good to me.

MatH · #5 08-28-2006, 01:39 AM

If one uses a 500mm lens at 1/160 time one wil probably se shake blur with radius about 20 pixels or less on 6mp sensor. 10 pixels on 16x24mm 6mp sensor are 20*16/2000=0,16mm long. Even if sensor travels twice as much, that's far from 1cm. Of course Canon wil devaluate sensor shift blur reduction and promote in lens solution.

jeisner · #6 08-28-2006, 02:19 AM

OK so I put my Tamron 1.4x teleconverter on the F*300/4.5 and took two shots, sorry just boring indoor shot of a pill packet (was dark before I got home).. obviously both handheld and at ISO 800 and f4.5 and 1/125... These are 100% crops of camera generated JPEGs..

I took a couple of shots and the results were consistant... So it seems even at 420mm in body IS still works...

SR OFF

SR ON

jeisner · #7 08-28-2006, 03:29 AM

P.S. I couldn't feel any movement, pretty good considering the > 1cm sensor movement ;-)

Sorry couldn't help myself, I love how much stuff marketing departments can just make up

WightWalker · #8 08-28-2006, 04:10 AM

Quote:

Originally Posted by jeisner

P.S. I couldn't feel any movement, pretty good considering the > 1cm sensor movement ;-)

Sorry couldn't help myself, I love how much stuff marketing departments can just make up

10mm of sensor movement, I doubt it very much given the size of the APS sensor.

Check out this url:
http://www.pentaximaging.com/files/s...20reduction%22

MatH · #9 08-28-2006, 04:59 AM

If memory serves me right, you can manually dial in focal lenght for older lenses up to 800mm. Anything loner than that requires tripod or Arnie

jeisner · #10 08-28-2006, 05:28 AM

Quote:

Originally Posted by MatH

If memory serves me right, you can manually dial in focal lenght for older lenses up to 800mm. Anything loner than that requires tripod or Arnie

LOL, yeah I think I can manage without a stabalised 1000mm lens...