Stack two 1.4X TC's on DA*300/4 (4 imgs)

Started Apr 11, 2014 | Discussions thread
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brandrx Forum Pro • Posts: 28,337
Stack two 1.4X TC's on DA*300/4 (4 imgs)

Hi folks,

Stacking two Pentax 1.4X HD AW teleconverters on a DA*300/4 using a Pentax K-3.

If you first manual focus the lens to near focus then the rig will autofocus and lock focus.

The images are just to show that perhaps a rig like this could be usable. Note: If you use a DA*60-250/4 lens at 250mm then most of the time you need not pre-focus the lens manually.

I am guessing that the subject distance was 100+ feet (30+ meters). Shot handheld.

When stacking two of these teleconverters the second teleconverter does not make any corrections for focal length and aperture. So, multiply what you see in the EXIF by 1.4 for correct readins.

Image #1 - The shot.

Image #2 - The crop (100%).

Image #3 - The shot.

Image #4 - The crop (100%).



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Ron - 'We don't have time to go take pics this afternoon Carl.'
Carl - 'What do you mean? It will only take 1/1000s.'
'Keep your eyes looking forward. However, glance back now and then to see where you've come from. It will put a smile on your face.' ~ brandrx

Pentax K-3
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