Cheap extension tube photos
Apr 26, 2015 16:11:49 #
A good reason not to buy a cheap $60.00 set of auto extension tubes for your Nikon.
Pictured is one of the three flanges that hold everything onto the camera. They are 2mm wide, by 1mm thick. The actual offset width that attaches to the camera flange is only 1.5mm.
Incredibly, the attachment surface on the tube body for the three plastic flanges is only about .5mm. With one of them 2.5cm long and the other two 2cm, that doesnt make for a very strong grip.
A little bit of flex with more than a short lens attached? Its those little tabs starting to break off. When they have broken off enough, everything drops off the camera body. I was fortunate in that they didnt have far to drop and the Micro-Nikkor 105mm lens was not to my knowledge damaged. Extension tubes were of the Opteka brand.
Pictured is one of the three flanges that hold everything onto the camera. They are 2mm wide, by 1mm thick. The actual offset width that attaches to the camera flange is only 1.5mm.
Incredibly, the attachment surface on the tube body for the three plastic flanges is only about .5mm. With one of them 2.5cm long and the other two 2cm, that doesnt make for a very strong grip.
A little bit of flex with more than a short lens attached? Its those little tabs starting to break off. When they have broken off enough, everything drops off the camera body. I was fortunate in that they didnt have far to drop and the Micro-Nikkor 105mm lens was not to my knowledge damaged. Extension tubes were of the Opteka brand.
2mm width showing attachment surface on upper edge
(Download)
1mm thick, edge view
(Download)
partial flange remaining on tube body
(Download)
Apr 26, 2015 16:34:22 #
Apr 27, 2015 00:21:35 #
napabob wrote:
Got that right :shock:sphincter twitch either way :shock:
Thanks for the heads up Muddy :wink:
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