It is also possible with other tools, such as a small and rigid screw driver. But this way you can only insert it in one drilling and have to apply a lot more force to unscrew it counterclockwise, but it is possible.
The Sony Alpha 7 cameras – especially the 7S and 7SII – are very interesting for astronomical purposes because of their high sensitivity, short backfocus light weight and very compact body dimensions. We produce a very short T-adapter for Sony E-Mount/NEX bayonet, which adds only 8.3 mm onto the 18 mm backfocus of the camera housing. This enables an adaptation to all backfocus-critical systems like HyperStar or fast Newtonians. All other T-adapters with T-2-thread which are commercially available at the moment do vignett the light path. We have encorporated the well-tested system of our Protective EOS-T-Ring into the Sony-adapter: Besides the T2-thread, the design also includes an M48-thread – and even bigger – the outer part of our ultrawide S52-clamping system. We will soon offer a 2" nose-piece with S52-ring-clamp. This 2"-nose-piece does provide you with an unobstructed clear inner diameter of 46mm and eliminates vignetting with the Sony Alpha 7 cameras even with very fast optical systems. The Baader SONY-E-Mount/NEX bayonet T-Adapter already got introduced in our last newsletter.
Please check out the GIF-Ani which explains how to refit from T-2 to M48 (center) – as well as the gain in clear aperture (left/right).
|Optical tube length||8,3|
|Usage||zum Anschluss von (D)SLR Kameras an das Astro T-2 Gewinde|
|Camera Adaptable||Sony E/NEX|
|Inner Diameter / Clear Aperture (mm)||41|
|Inner Connection (lens sided)||Thread, Dovetail ring clamp, S52, T-2 (M42 x 0,75), M48|
|Outer Connection (eyepiece/-camera-sided)||Bayonet|
|Compatible Brands||Astro T-2, Baader Planetarium|
|Type of Adapter||Camera Adapter|