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Tamron 400mm F6.3 dismantled..
Now this is going to be tough..
I have the front group out out the tube (it seems it is just an ordinary achromatic doublet, ~300mm FL. The rest of optics in the system is rear group of two elements, functioning as a field flattener), but I can't unscrew the retaining ring of the cell, it is too tight..
I will have to make a special tool to pull it apart, and this will take some time...
Last edited by bojan; 02-04-2010 at 04:23 PM.
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