Just saw this and it seems like people uses these for taking bird photos and celestial bodies like moon etc
Basically it is attaching a scope to your dslr, then you can take photos in manual focus. The below Pentax scope will give you 1600mm to 4800mm, even saw another Pentax scope that will provide 2000mm to 6000mm.
http://store.birdwatching.net/store/-strse-369/Detail.bok
Basically it is attaching a scope to your dslr, then you can take photos in manual focus. The below Pentax scope will give you 1600mm to 4800mm, even saw another Pentax scope that will provide 2000mm to 6000mm.
http://store.birdwatching.net/store/-strse-369/Detail.bok
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