None FA lenses on K-1 crop factor
Posted 24/02/2016 - 14:53
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The K1 will automatically crop the image when a DA lens is attached (unless told otherwise via the menu) so it will still give you the 1.5 crop factor and an image the same size as from an APS-C sensor body, If you disable this in the camera settings the lens will give you a full frame image as per its focal length (not cropped) however there may be vignetting round the outer edges of the frame where the DA lenses image circle doesn't fully cover the sensor.
Posted 24/02/2016 - 15:30
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No is the answer - an 18-55 lens is an 18-55 lens regardless of the camera, you will get a wider angle of view but as fatspider says the automatic crop will turn the K-1 into a 15MP APS-C camera with an APS-C lens attached, effectively making e.g. the 18-55 the equivalent of 27-82mm- the focal length does not change.
AKA Welshwizard/PWynneJ
Assorted Pentax/Nikon/Mamiya stuff
Assorted Pentax/Nikon/Mamiya stuff
Posted 24/02/2016 - 16:15
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ilovesaabs wrote:
No is the answer - an 18-55 lens is an 18-55 lens regardless of the camera, you will get a wider angle of view but as fatspider says the automatic crop will turn the K-1 into a 15MP APS-C camera with an APS-C lens attached, effectively making e.g. the 18-55 the equivalent of 27-82mm- the focal length does not change.
Fatspiders answer is much better IMO.No is the answer - an 18-55 lens is an 18-55 lens regardless of the camera, you will get a wider angle of view but as fatspider says the automatic crop will turn the K-1 into a 15MP APS-C camera with an APS-C lens attached, effectively making e.g. the 18-55 the equivalent of 27-82mm- the focal length does not change.
You are correct that the focal length doesn't change (the OP didn't suggest it did).
FOV for DA lenses will apparently be at the same crop factor if auto cropping is enabled, if autocrop is turned off it will depend on the crop given in post to deal with insufficent coverage of DA lenses. Some of the primes cover the full frame sensor, those that don't (and the zooms) will vary in how much they actually cover.
Older lenses such as the F series, A series... will give full coverage as well as the FA lenses.
Mike
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Pentax:K5ii, K7, K100D, DA18-55, DA10-17, DA55-300, DA50-200, F100-300, F50, DA35 AL, 4* M50, 2* M135, Helicoid extension, Tak 300 f4 (& 6 film bodies)
3rd Party: Bigmos (Sigma 150-500mm OS HSM),2* 28mm, 100mm macro, 28-200 zoom, 35-80 zoom, 80-200 zoom, 80-210 zoom, 300mm M42, 600 mirror, 1000-4000 scope, 50mm M42, enlarger lenses, Sony & micro 4/3 cameras with various PK mounts, Zenit E...
Far to many tele-converters, adapters, project parts & extension tubes etc.
.[size=11:].Flickr• WPF• Panoramio
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Pentax:K5ii, K7, K100D, DA18-55, DA10-17, DA55-300, DA50-200, F100-300, F50, DA35 AL, 4* M50, 2* M135, Helicoid extension, Tak 300 f4 (& 6 film bodies)
3rd Party: Bigmos (Sigma 150-500mm OS HSM),2* 28mm, 100mm macro, 28-200 zoom, 35-80 zoom, 80-200 zoom, 80-210 zoom, 300mm M42, 600 mirror, 1000-4000 scope, 50mm M42, enlarger lenses, Sony & micro 4/3 cameras with various PK mounts, Zenit E...
Far to many tele-converters, adapters, project parts & extension tubes etc.
.[size=11:].Flickr• WPF• Panoramio
Posted 24/02/2016 - 18:13
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I didn't know there was a competition
AKA Welshwizard/PWynneJ
Assorted Pentax/Nikon/Mamiya stuff
Assorted Pentax/Nikon/Mamiya stuff
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123 posts
12 years
Sorry the subject should say non-FA
Lenses: Pentax D-FA 24-70mm 2.8, D-FA 15-30 2.8, D-FA 70-200 2.8*, Pentax 35mm 2.4, 50mm 1.8, 18-135mm WR, 55-300mm HD, Sigma 70-300mm (macro), Tamron 17-50mm F2.8.
Film: Mamiya C330 Medium Format, Pentax Super ME.