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Forum: Pentax SLR Lens Discussion 01-18-2010, 05:19 PM  
Pentax DA 40mm Limited focus question
Posted By daveboettger
Replies: 8
Views: 3,246
Thanks everyone for your replies. How can I post the entire original file? There seems to be a size limit... and it seems even in this crop the resolution was scaled down... the effect is actually more pronounced than it appears here.

There is a UV filter on there, but the camera settings are the same as when I shoot with other lenses and I see nothing like that. I'll try taking some more controlled test shots with/without the filter on.

Thanks,
Dave
Forum: Pentax SLR Lens Discussion 01-18-2010, 01:28 AM  
Pentax DA 40mm Limited focus question
Posted By daveboettger
Replies: 8
Views: 3,246
Hi,

I have a DA 40 Limited 'Pancake' and I've noticed what to me is strange behavior. Areas that are out of focus do not blur as I would normally expect but instead get weird ghosting or halo patterns around them. I include a cropped sample from an image where you can see this clearly. This was shot at f/2.8, which makes the effect worse. Is this normal behavior on this lens, or do I have a defective lens? I also feel that the focus never gets quite as sharp as on my 18-55 kit lens (regardless of aperture), which surprises me. What do you guys think?

Thanks!
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