samyang 18-28mm focusing problem

EarnieR · 11-22-2021, 01:44 AM

hi, I am having trouble with my old Samyang 18-28mm f/4-4.5. I can focus close objects but landscapes are not sharp. I am using a K10d, IST Ds and Dl.
any help would be appreciated.

Thank you

Paul the Sunman · 11-22-2021, 03:15 AM

Did it used to focus to infinity before on these cameras?

kayakfari · 11-22-2021, 10:06 AM

This is a horrible lens! Tried it out years ago and found it difficult to focus, big distortion and poor sharpness at any aperture.
Your example may need adjustment to align infinity again.
It's a cheap lens, prob not worth it unless you can do it yourself.

**kiwi_jono** · 11-22-2021, 06:54 PM

Just wanted to add Samyang lenses commonly have problems with infinity focus calibration. Good news is most are relatively easy to adjust (Googling your model + infinity adjust might work).

EarnieR · 12-13-2021, 04:02 PM

I had a chance to play with it outside the other day and the best focus, witch is OK at best, is still sharper than infinity. By the way, how much does it cost to get a lens like this fixed?
Oh, and thanks for the replies by the way your info was helpful.

Earnie

11-22-2021, 01:44 AM	#1
EarnieR New Member Join Date: Jan 2020 Posts: 7	samyang 18-28mm focusing problem hi, I am having trouble with my old Samyang 18-28mm f/4-4.5. I can focus close objects but landscapes are not sharp. I am using a K10d, IST Ds and Dl. any help would be appreciated. Thank you

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11-22-2021, 03:15 AM	#2
Paul the Sunman Pentaxian Join Date: Aug 2011 Location: Melbourne Photos: Gallery Posts: 4,843	Did it used to focus to infinity before on these cameras?

11-22-2021, 10:06 AM	#3
kayakfari Senior Member Join Date: Oct 2016 Location: South Florida Posts: 173	This is a horrible lens! Tried it out years ago and found it difficult to focus, big distortion and poor sharpness at any aperture. Your example may need adjustment to align infinity again. It's a cheap lens, prob not worth it unless you can do it yourself.

11-22-2021, 06:54 PM	#4
kiwi_jono Loyal Site Supporter Join Date: Dec 2009 Location: Christchurch, New Zealand Photos: Gallery \| Albums Posts: 2,437	Just wanted to add Samyang lenses commonly have problems with infinity focus calibration. Good news is most are relatively easy to adjust (Googling your model + infinity adjust might work).

12-13-2021, 04:02 PM	#5
EarnieR New Member Join Date: Jan 2020 Posts: 7 Original Poster	I had a chance to play with it outside the other day and the best focus, witch is OK at best, is still sharper than infinity. By the way, how much does it cost to get a lens like this fixed? Oh, and thanks for the replies by the way your info was helpful. Earnie