T-2 BBHS® Prism Diagonal with 36mm prism

Yes, the part used in this diagonal is our M36.4 / T-2 Adapter: https://www.baader-planetarium.com/en/baader-adapter-m36.4--t-2-(t-2-part-03).html

The Mewlon should have a back focus of 210 mm, as far as I can see. The 2" BDS-SC Baader Diamond Steeltrack® Focuser # 2957220 has got a length of 93-123mm (with the included 2" clamp) The 2" BDS-SC Baader Diamond Steeltrack® Focuser # 2957220 has got a length of 3mm and fits onto the T-2-star diagonal. You can rotate it in the SteelTrack easily by opening the eyepiece clamp of the SteelTrack. The star diagonal has got a length of 38,5mm A 2" eyepiece clamp like Baader 2" ClickLock T-2 (M42i x 0.75) clamp #2956242 adds another 36 mm This makes a total length of 170,5-200,5mm, so that should be no problem even if you might need another adapter for the thread on the back of the Mewlon (I'm not sure which threads are used on the Mewlon and if another adapter to the SC-thread is needed for the SteelTrack). If you need to place the eyepiece farter away, you can use T-2-extensions at the star diagonal, if necessary. Two T-2 / 15 mm Extension Tubes #1508154 would bring you into the optimum distance to place the eyepiece in a distance of 200-230mm, well around the 210mm of perfect back focus.

If the Mewlon is already equipped with an Steeldrive focuser, you can easily fit in the mirror with the 2" barrel. Unfortunately we do not know the focus travel of your telescope, therefore we cannot say for sure which eyepieces will work and which will not.

The image is a bit brighter and more crisp than in a standard T-2-diagonal. It is hard to specify in a short answer, so we'd ask you to take look at these PDFs and reviews: Baader Star Diagonals (T-2 and 2") - Overview & Comparison: https://www.baader-planetarium.com/en/downloads/dl/file/id/1617/product/2871/baader_star_diagonals_t_2_and_2.pdf Testreview - Mirror vs. dielectric vs. prism diagonal comparison - W. Paolini https://www.baader-planetarium.com/en/downloads/dl/file/id/160/product/2871/testreview_mirror_vs_dielectric_vs_prism_diagonal_comparison_w_paolini.pdf Testreview - THE BAADER BBHS-SITALL SILVER DIAGONAL - W. Paolini https://www.baader-planetarium.com/en/downloads/dl/file/id/293/product/2871/testreview_the_baader_bbhs_sitall_silver_diagonal_w_paolini.pdf

No - the smallest diagonal (prism) is this one https://www.baader-planetarium.com/en/accessories/optical-accessories/prism-and-mirror-star-diagonals/baader-prism-diagonal-t-290%C2%B0-32mm.html r

Yes this will work, but generally we recommend to place the camera directly in the light beam of the telescope without a mirror in between.