replied, thank you

replied, thank you

hello,

as in the title, I am after Pentax 17-70 in good condition. PM me please with offer if you have one for sale.
Cheers

@ChrisA: yes, agreed. I was going to provide an image with circle that would indicate where the issue is. I had some issues with laptop/software yesterday and were not able to complete this task. Thank you for providing the image. That's exactly the spot I am referring to.
I have taken lots of pis last week and there is not even smallest sign of this artifact.

@Jak: yes, I have tried different lens and artifact was not there.

Hence why I am so puzzled right now. Would dust particle in the lens cause such issue at smaller aperture only? Or, is it down to sensor (if so, is it faulty?)
Please advise

thank you very much for your feedback. Pictures were taken yesterday during my walk along Seven Sisters cliffs: Seaford to Eastbourne.

Now, back to picture. That thing which you can see close to the cliff edge at F11 is not a seagull. I wish it was a seagull but it's not. This artifact appeared on over 60% of my pictures yesterday regardless of the subject shot. I have run few test at home and shot pics against white wall to check if I can see it again. The bad news is that it's still there but only at smaller aperture (larger number). To see what I mean, please have a look at highest end of cliff, next to two bars - now move your eyes left. Slightly to the left from the center of image is a blurry thing. I have no idea what it is. Did any of you come across that issue before? Lens is pretty much brand new - very well looked after. I took perhaps 150 pics with it and mounted on camera once where it stayed till yesterday.
Please advise

Thank you again

Hi guys,

3 months ago I have purchased Tamron 17-50. initially the lens performed quite well but today out of a sudden a odd artifact appeared.Besides, lens lost its focus and most pics from today are quite a bit out of focus. I am walking along countryside trails a lot and wanted to compare pics from K5 with my previous camera (Nikon D90) hence why I have I have chosen the same route I followed with D90. To my surprise, image quality of D90 simply kills pics from K5. Sounds not right doesn't it?
Anyway, artifact pictures are here. Depending on focal length the artifact appears or not - you can see it right next to cliff edge:
Fnumber 11
http://postimage.org/image/b568fwd4h/full/
and artifact is gone :FNumber 4
http://postimage.org/image/ianvo49l1/full/
I am not providing above as direct image links as pics are quite large.
As you can see, both images are not really sharp not to mention that colors are bit off.

anyway, do you have any idea why the artifact appears if F number is higher than 4? Image sensor is clean and there is no artifact if I use different lens.
Pics comparison between K5 and D90 will be here shortly.

Thanks

lens sold!

Bump! and price reduction to 145£! and finally, pics below!

Hello,

I have for sale SMC Pentax DA 16-45mm F4 ED AL lens in very good/clean condition purchased via this forum 4-5 weeks ago. Lens comes with box, hood and both caps.
Reason for selling? My lady has made me amazing Christmas present and bought me Sigma 17-70. I see no point in keeping both lenses as one of them will definitely be sitting in the box.
Price: 159£ including RMSD.

Thanks

Hi Chris,

Could you please drop me a pm as I am unable to send one?
Cheers
Janusz