Extention Tubes
Posted 05/04/2011 - 22:58
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That's correct. They all have the mechanical aperture stop down though
[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 06/04/2011 - 09:12
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SteveEveritt wrote:
Hi Frogherder, there is a set of Jessops PK tubes BIN on ebay but be careful I think you need the PKA type to have the contacts to enable communication with the lens...correct me if I am wrong guys.
They are the mechanical type and DO NOT have the contacts for the communication with the camera. They will work with PK M Lenses fine but will not transfer any auto settings to the camera.
Hi Frogherder, there is a set of Jessops PK tubes BIN on ebay but be careful I think you need the PKA type to have the contacts to enable communication with the lens...correct me if I am wrong guys.
Kind regards
SmutjeUK
It's nice to be nice!
Pentax K-5 with D-GB4 Grip, to many lenses to mention by now (serious LBA by now), TC's, Lowepro Slingshot 300 AW, Manfrotto 028 & Redsnapper RS-283 with various Heads plus various Camera Clamps (I collect them). Pentax AF 360FGZ, Pentax AF 240FT, several Metz 45 CT-1 & 5 with stands and 'Blow Up' Soft Boxes, Flash Triggers, and various Macro gear.
SmutjeUK
It's nice to be nice!
Pentax K-5 with D-GB4 Grip, to many lenses to mention by now (serious LBA by now), TC's, Lowepro Slingshot 300 AW, Manfrotto 028 & Redsnapper RS-283 with various Heads plus various Camera Clamps (I collect them). Pentax AF 360FGZ, Pentax AF 240FT, several Metz 45 CT-1 & 5 with stands and 'Blow Up' Soft Boxes, Flash Triggers, and various Macro gear.
Posted 07/04/2011 - 08:55
Link
Thanks for all your comments - I'll be on the look out.
Just a thought regarding depth of field :-
Say I use a 55mm lens and a tube extension and fill the AF frame in the viewfinder with a ladybird.
The alternative is a 300mm macro lens also with appropriate tube to get the same sized image.
Which setup would give the greatest depth of field (focus) [I don't really want to get into the technicalities of which is the correct term - I'm told they're different]
Bernard
Just a thought regarding depth of field :-
Say I use a 55mm lens and a tube extension and fill the AF frame in the viewfinder with a ladybird.
The alternative is a 300mm macro lens also with appropriate tube to get the same sized image.
Which setup would give the greatest depth of field (focus) [I don't really want to get into the technicalities of which is the correct term - I'm told they're different]
Bernard
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