DA 300 AND F1.7 AF ADAPTOR
Never mind onward and upwards
https://pentaxphotogallery.com/artists/barrieforbes
https://www.flickr.com/photos/189482630@N03/
I thought that in the absence of sdm contacts the lens would work on the screw drive as it does on my K110d.
Never mind onward and upwards
I think you must be mistaken. The 1.7x AF adapter can't possibly focus the lens fitted to the front of it on any camera because there is no screw drive on the female side of the adapter, only on the male side.
Keep in mind that it was originally designed for use with MF lenses in the first place, the adapter providing the AF.
I thought that in the absence of sdm contacts the lens would work on the screw drive as it does on my K110d.
Never mind onward and upwards
I think you must be mistaken. The 1.7x AF adapter can't possibly focus the lens fitted to the front of it on any camera because there is no screw drive on the female side of the adapter, only on the male side.
Keep in mind that it was originally designed for use with MF lenses in the first place, the adapter providing the AF.
it would be absurd to have a mechanical screwdrive focussing both the teleconvertor AND the lens anyway. Either one of the other but not both
Lenses: Pentax DA 10-17mm ED(IF) Fish Eye, Pentax DA 14mm f/2.8, Sigma 17-70mm f/2.8, Pentax-A 28mm f/2.8, Sigma 30mm F1.4 EX DC, Pentax-A 50mm f/1.2, Pentax-A 50mm f/1.4, Pentax-FA 50mm f/1.4, Pentax-A 50mm f/1.7, Pentax DA* 50-135mm f/2.8, Sigma 135-400mm APO DG, and more ..
Flash: AF-540FGZ, Vivitar 283
I thought that in the absence of sdm contacts the lens would work on the screw drive as it does on my K110d.
Never mind onward and upwards
I think you must be mistaken. The 1.7x AF adapter can't possibly focus the lens fitted to the front of it on any camera because there is no screw drive on the female side of the adapter, only on the male side.
Keep in mind that it was originally designed for use with MF lenses in the first place, the adapter providing the AF.
Nope not mistaken
Lens works on 110d on screw drive, never tried it with af adaptor on that camera.
Gave it a go on K30 yesterday and it is very good
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1716 posts
13 years
Northumberland
Any thoughts
thanks
G