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Message: <blockquote data-quote="Paul Corfield" data-source="post: 3202011" data-attributes="member: 19132">I picked up this behemoth of a TC on ebay this week for cheap money. It's for the medium format Pentax 6X7 cameras and as you can see in the photo it's huge compared to my 2X Teleplus Macro Focusing TC which itself is quite big.Counting the reflections down through the lenses it appears to be a 7 element design. Photos are really nice, they are very sharp and contrast is very good. I could only hand hold both the camera and TC behind the scope to take these test photos but initial results are very promising. There are 6X7 adapter for most cameras but a 6X7 to telescope adapter seems to be very expensive. That just leaves me the option to remove the TC and mount it in something else which is a shame. I might see if I can come up with something before I commit to taking it apart.Here's a few photos and yes, the hover fly was taken using the hand holding method mentioned above. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile    :)" loading="lazy" data-shortname=":)" />Just holding the TC up to the camera body is giving in the region of 1.7X mag. There is around 1.5" from the back of the TC to the rear element. If the TC was removed from the housing and mounted closer to the camera then I guess the mag would be down around the 1.4 to 1.5X.Paul.</blockquote>