Thanks all.
Mike, I'm the same vintage so it sounds like a field flattener would help me. If I could figure out how to attach it.
Sounds like the TSFLAT2 works with a range of scopes from f/4 to f/9. The Stowaway has a 2.5" focuser and comes with a 2" adapter, so I guess the TSFLAT2 will screw right into the AP adapter.
EDITED after reading your post more carefully: Sound like a 2" diagonal will attach directly to the "eye side" of the TSFLAT2, or with a readily available 2" to T2 adapter for the Baader T2 diagonals.
Rexowner, thank you for taking the time and posting the link. The input data didn't persist when I clicked it.
On the Precise Parts site, I'd pick the AP 92FF for the scope side?
For the eye side and the AP MaxBright diagonal, I'd need the "A-P 92 Stowaway f/6.65 DoveLoc adapter?" For a Baader 2" diagonal, the eye side would be the "Baader two inch diagonal body - native?"
Looking at the diagram on the AP site at https://astro-physic...aging-train.pdf, I think the train would be:
- Scope -> AP Focuser end cap -> AP 92FF field flattener -> Precise Parts adapter -> AP 2" Doveloc adapter -> Diagonal -> Eyepiece
I should call AP to confirm. Between the $550 field flattener and $150 for the custom adapter, this might remain no more than a thought experiment.
Unless I can get the TSFLAT2 to work without additional adapters or spacers...
I believe that if you want to essentially replace the nosepiece on a 2" Baader Planetarium diagonal with the flattener
the thread is a 2" SC Thread. BP is distributed by Alpine Astronomical in Idaho. They are experts in all things Baader.
To make it more complicated, you had mentioned possibly wanting to do NV in the future with the BBHS diagonal.
FWIW, I do NV with Baader BBHS diagonals, and if you do NV, it's handy to swap filters in and out without having
to screw them into each individual eyepiece etc. E.g., you might want to use a narrowband HA filter for a nebula,
and use a different long pass filter to allow stars to be seen as well. For that, I use the Baader UFC system, which
I highly recommend, and you could use for NV filters whether or not you use a flattener.
FWIW, IIRC my 2" setup is:
Eyepiece Side
Baader 2" BBHS with nosepiece removed p/n 2456115 <--(2" SC thread)-->Baader p/n 2459120 <--(UFC std)-->
Baader p/n 2459110 UFC Base <--(S70 std)--> Baader p/n 2459128 <--(2" SC thread)--> 2" nosepiece from diagonal
Telescope Side
-> so, in theory, a precise parts 2" SC thread <--> threads to flattener adapter and use this with a 2" Baader diagonal
with or without the filter drawer.
I have a similar T2 setup I can use with 1.25" eyepieces and just about any filter, since the Baader UFC system allows
for different size filters.
Personally, I went for a filter drawer which optimized for NV filters, or e.g. density neutral filters for moon viewing etc,
and use flatteners only for astrophotography. Ease of use of different filters was a bigger deal for me, but YMMV.