topic Image moves in viewfinder in EOS DSLR & Mirrorless Cameras

Image moves in viewfinder

koolbreeze — Mon, 25 Jan 2016 16:28:39 GMT

Hello, all!

Got an SL1 a couple months ago. I've noticed that sometimes when I'm shooting and I'm composing a shot, I will press the shutter release half way for focus and exposure lock, and the image moves in the viewfinder, ostensibly to center the subject in the image!

I have been learning the new camera and I shoot mostly professional images for catalog use and I don't always want the product perfectly centered. I have gone thru the menus and have perused the SL1 manual and can't find an answer on what's causing this and how to disable it.

I thought it might be a lens I use but the only swithches are Manual/ Auto Focus and Optical Stabilization. I only use Manual focus and never use OS when shooting professional work.

A little help? TIA.

Re: Image moves in viewfinder

cicopo — Tue, 26 Jan 2016 02:34:17 GMT

Sigma's OS causes that but say you have it turned off. I haven't noticed Canon's IS ever do it to the level Sigma lenses did.

Re: Image moves in viewfinder

koolbreeze — Tue, 26 Jan 2016 12:27:10 GMT

K, thx. I'll pay more attention when I shoot with the Sigma...

Re: Image moves in viewfinder

ebiggs1 — Tue, 26 Jan 2016 15:51:41 GMT

Which Sigma lens are you using? The older models were pretty bad for doing this. Turning off the OS will stop it.

It is pretty good advice to use and buy only Sigma "EX" or "Art" lenses. They are pretty safe bets to work on Canon cameras.

I had an older model 150-500mm Sigma that would jump a hummingbird clear out of the frame!

Re: Image moves in viewfinder

koolbreeze — Tue, 26 Jan 2016 22:00:14 GMT

It's a Sigma DC 18-250 f3.5/6.3 Macro HSM that's about a year old. It is a clear sharp lens and it's a good one-size-fits-all type but I have some other issues with it such as zoom creep and I may contact Sigma about tightening it up.

Re: Image moves in viewfinder

ebiggs1 — Tue, 26 Jan 2016 22:31:27 GMT

Let's make one thing absolutely clear, all super zooms are compromises.The Sigma 18-250mm f/3.5-6.3 DC Macro OS HSM is compact, has decent optics, has fast autofocus and decent OS, but, there is always a 'but', isn't there? But it is a inexpensive lens. It acts like an inexpensive lens. All zooms tend to creep sooner or later. I doubt Sigma can do much about it. If they will do anything at all.

I would just learn its peculiar attributes and use it. You might be able to put a fat rubber band around it to stop the creep. That is what I do, as even Canon "L" zoom lenses creep.

Re: Image moves in viewfinder

koolbreeze — Wed, 27 Jan 2016 13:33:16 GMT

all super zooms are compromises

I know but it was good price and there are times when I don't want to carry a lot of stuff with me. Zoom creep, in this day and age of CAD/CAM which has produced lenses like this, shouldn't even exist. I usually just stick a piece of tape on it if I'm having an issue with creep. I like the rubber band idea, tho. Will give that a try too.

Re: Image moves in viewfinder

Waddizzle — Wed, 03 Feb 2016 15:49:21 GMT

@ebiggs1 wrote:
Which Sigma lens are you using? The older models were pretty bad for doing this. Turning off the OS will stop it.
It is pretty good advice to use and buy only Sigma "EX" or "Art" lenses. They are pretty safe bets to work on Canon cameras.

I had an older model 150-500mm Sigma that would jump a hummingbird clear out of the frame!

Hmm. I guess this explains why it seems like the OS can get into a tug-of-war with the AF to me at times.