Planewave

With 6.5 nm FWHM there is a slight chance that you will get sufficient signal when moving from f/7 (Edge HD w. reducer/corrector) to f/2 or f/1.9. However – this needs to be tested as it is not within our usual offer, which separates clearly between filters made for f/10 to f/3.5

For Ulra-Narrowband filters with 3.5 or 4 nm FWHM there is no chance to cover such a wide range of FLs. there you would always have to buy two different filter sets to cover both sets of FL-ratios.

The Reducer/Flattner has a M48 male thread at the camera side so you´ll need a #2956248 ClickLock with M48 female thread. Please notice
that the ClickLock is 36,5mm long so you have 18,5mm left to the sensor of a camera. A camera adaption can be difficult.

Sorry - you will need to see this for yourself. Vignetting is not a problem if you put the baffle into the right place. Vignetting must go above 40% until the human eye will see it at the edge of field.

Many eyepiece makers use this effect to "virtually sharpen" the stars at the edge of field - and this never got noticed.

Fact is - you may have a light cone of 26mm entering the bino, but what you actually see is the field created by the 30 mm prisms in the bino.

Please - check the Cloudy Nights forum for Binocular Viewers. You will find hundreds of threads covering this subject. And you will see that all people there regard our Mark V the best.

Yes this is the right choice!

Surely the techincal drawings of the Items will be helpful for you, please see:
https://www.baader-planetarium.com/en/downloads/dl/file/id/30/product/2859/bds_nt_dimensions_technical_drawing.pdf
https://www.baader-planetarium.com/en/downloads/dl/file/id/31/product/2859/bds_nt_versabase_dimensions_technical_drawing.pdf
For most of our products you can find further informationen always under the link "Downloads" like manuals, drawings, software, etc.