lens calibration
Posted 15/02/2011 - 15:59
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Laser cut MDF!
Luxury
I shall use my chop saw and jigsaw.
Luxury
I shall use my chop saw and jigsaw.
[i]Bodies: 1x K-5IIs, 2x K-5, Sony TX-5, Nokia 808
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
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
Posted 14/03/2018 - 19:22
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Old thread but I need to re calibrate my 55-300.
Did this recently but being a zoom I need to rethink this for the long end, where I use this most.
All shots consistently back focussed.
What aperture does one go for in this test? Assume the lowest number you can for the lens, so you get as narrow a focus field as possible?
Did this recently but being a zoom I need to rethink this for the long end, where I use this most.
All shots consistently back focussed.
What aperture does one go for in this test? Assume the lowest number you can for the lens, so you get as narrow a focus field as possible?
Posted 14/03/2018 - 21:14
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I set up my tripod outside and focus on the car's number plate. Worked a dream when I was sorting out my FA31... No jigsaws, chopsaws or MDF needed.
With a zoom, you might have to compromise. If you use the long end most, get that set-up and put up with errors at the other end. If you use all the lengths, then trying it at the short end, middle and long end then picking a compromise value. Remember to defocus between each shot.
K.
With a zoom, you might have to compromise. If you use the long end most, get that set-up and put up with errors at the other end. If you use all the lengths, then trying it at the short end, middle and long end then picking a compromise value. Remember to defocus between each shot.
K.
Kris Lockyear
It is an illusion that photos are made with the camera… they are made with the eye, heart and head. Henri Cartier-Bresson
Lots of film bodies, a couple of digital ones, too many lenses (mainly older glass) and a Horseman LE 5x4.
It is an illusion that photos are made with the camera… they are made with the eye, heart and head. Henri Cartier-Bresson
Lots of film bodies, a couple of digital ones, too many lenses (mainly older glass) and a Horseman LE 5x4.
Posted 15/03/2018 - 05:24
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Its a wonderful focusing aid to use Clothes pegs. Try it out
Posted 15/03/2018 - 08:01
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I use the back end of a bus!
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Half Man... Half Pentax ... Half Cucumber
Pentax K-1 + K-5 and some other stuff
Algi
Pentax K-1 + K-5 and some other stuff
Algi
Posted 15/03/2018 - 10:38
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What does Mrs Algernon have to say about this?
AKA Welshwizard/PWynneJ
Assorted Pentax/Nikon/Mamiya stuff
Assorted Pentax/Nikon/Mamiya stuff
Posted 15/03/2018 - 11:12
Link
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Half Man... Half Pentax ... Half Cucumber
Pentax K-1 + K-5 and some other stuff
Algi
Pentax K-1 + K-5 and some other stuff
Algi
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611 posts
19 years
Surrey
Over £100 - WTF!!!
I could knock something up like the lensalign in about 20 minutes out of MDF.
In fact I will soon
Vic.
Sigma 8-16 Pentax DA 16-45 Pentax DA 55-300 Pentax 18-55WR Tamron 90 Di Macro Metz 44 AF-1