Yahoo Groups archive

Datacolor User to User Support Group.

Index last updated: 2026-04-28 23:18 UTC

Message

Re: [datacolor_group] Re: SpyderLensCal - a real world review

2010-10-16 by Sat Tara Khalsa

I can't speak for SLC, but I've had a LensAlign since it was introduced (not that long ago). I've done 4 Canon L lenses, all with a 5d mk II body. (about 7 grand worth of lenses - and these are GREAT lenses (not just expensive lenses) and a great body - not poor quality outliers) All needed some adjustment. (not a huge amount on any of these lenses - they'd be OK w/o adjustment, but I'd have to compensate a tiny amount in really critical situations). I'd expect the differences to be dramatically higher in 3rd party lenses, say Sigma or Tamron w/ the same body.

To clarify, though, you're not adjusting the lens alone, you're adjusting the lens/camera autofocus system. No two camera/lens combinations are identical because of minute differences in variables like the mount/sensor distance on the body and optical center/mount distance on the lenses. Camera manufacturers create lenses and bodies to high precision, but there are always minute differences so the manufacturers try to minimize the variations and create a happy balance. There's a reason high-end cameras now include micro-adjustment of autofocus.

stsk

On Oct 16, 2010, at 10:45 AM, PJS wrote:

Just for my clarification, of the "two million dollars" worth of equipment
you calibrated, what percentage actually needed adjustment?

pjs
"Light makes photography. Embrace light. Admire it.
Love it. But above all, know light.
Know it for all you are worth,
and you will know the key to photography."
George Eastman
RIP Kodachrome 1935-2009


Attachments

Move to quarantaine

This moves the raw source file on disk only. The archive index is not changed automatically, so you still need to run a manual refresh afterward.