Sigma 18-50 ex - problems! with focusing
5,866 posts
Link
Posted 12/02/2008 - 14:17
Which camera?
The only reason I ask is that my K10D had consistent back-focus on all lenses
I see from your signature that you have the *ist-D - try it on that as well.
The wider the aperture, the more critical focus becomes!
There's some info here: https://www.pentaxuser.com/forum/viewtopic.php?t=6126
HTH!
Matt
http://www.mattmatic.co.uk
(For gallery, tips and links)
The only reason I ask is that my K10D had consistent back-focus on all lenses
I see from your signature that you have the *ist-D - try it on that as well.
The wider the aperture, the more critical focus becomes!
There's some info here: https://www.pentaxuser.com/forum/viewtopic.php?t=6126
HTH!
Matt
http://www.mattmatic.co.uk
(For gallery, tips and links)
51 posts
Link
Posted 12/02/2008 - 15:36
cheers Matt (your pic scares me)
I will try on the istd as my k10 is the coupled camera at the moment.
shame - tonight I'm photographing a friend, manual focus it is!
Blue
Proud owner of: Pentax Me Super, Pentax MZ5n, Pentax ist D*, Pentax K10D, Pentax 540 FGZ Flash
I will try on the istd as my k10 is the coupled camera at the moment.
shame - tonight I'm photographing a friend, manual focus it is!
Blue
Proud owner of: Pentax Me Super, Pentax MZ5n, Pentax ist D*, Pentax K10D, Pentax 540 FGZ Flash
Link
Posted 12/02/2008 - 15:39
Is it happening at all focal lengths, as I have found my K100D Super can be troublesome with shorter focal lengths
K100D Super, 18-55, 50-200, Sigma 10-20, Sigma 70mm macro and lots of old lenses
K100D Super, 18-55, 50-200, Sigma 10-20, Sigma 70mm macro and lots of old lenses
Link
Posted 12/02/2008 - 16:08
Quote:
cheers Matt (your pic scares me)
cheers Matt (your pic scares me)
That wasn't me... it was my son
I've updated my avatar for the time being... hope this is better! LOL!
Matt
http://www.mattmatic.co.uk
(For gallery, tips and links)
Link
Posted 12/02/2008 - 19:34
sorry Matt... you are all perfectly photogenic. Thanks for the as ever good advice!
Proud owner of: Pentax Me Super, Pentax MZ5n, Pentax ist D*, Pentax K10D, Pentax 540 FGZ Flash
Proud owner of: Pentax Me Super, Pentax MZ5n, Pentax ist D*, Pentax K10D, Pentax 540 FGZ Flash
Add a Comment
You must be registered or logged-in to comment.
Bluewhistle
Member
I bought a Sigma 18-50 EX DG (do you ever wish they were just called Dave) from ebay for my K10. This is not the new macro version.
And on tests I keep getting a focus problem. The lens seems to be focusing behind the the subject.
Through the view finder it seems to focus and my shutter speeds are about 125 on a variety of apertures. Weirdly One shot was a 10th and came out sharp.
Is this a common problem! As I will need to get back onto the seller.
Thanks Ladies and Gents
Blue
PS This is the second ex lens that I haven't been Happy with. Shame the Pentax are always more expensive and rarer!!
Proud owner of: Pentax Me Super, Pentax MZ5n, Pentax ist D*, Pentax K10D, Pentax 540 FGZ Flash