I thought the question was more general and the (for astrophotography) was more or less an after-thought and added on.
The point to me is this: it comes down not so much to a particular scope as would a person prefer FPL-51 glass at a nice price point, or spend a bit more perhaps for FPL-53 or better.
That's exactly right, BlueMoon. So for example, one could get:
1.) A 80mm F5 Achromat with normal flint glass for $179: https://optcorp.com/...SMaAvsrEALw_wcB
2.) A 70mm F6 FPL-51 ED Doublet for $359: https://www.svbony.c...nomy-telescope/
3.) A 70mm F6 FPL-53 ED Doublet for $489: https://www.astronom...fpl-53-f-6.html
4.) A 80mm F6 Tripplet APO refractor for $849: https://www.astronom...ractor-ota.html
5.) A 70mm F5 Quadruplet APO refractor for $1199:https://www.google.c...HX_7CkoQ8wIIrQY
6.) A 80mm F5 FPL-53 Tripplet APO refractor for $1699: https://www.highpoin...elescope-s11400
7.) A 85mm F5.3 four element double ED Petzval system APO refractor for $3900: https://www.highpoin...ttener-tqe08541
The pay range for telescopes of relatively similar sizes and F-factors is truly astounding!
Is the doublet I referred to in the beginning relatively speaking on the price/performance curve? Is it a total rip off? Or are we getting comparatively more value out of this for the price we are paying? I am looking for a relatively affordable and transportable grab-n-go telescope but would prefer not to spend so much.
Edited by thornhale, 07 April 2021 - 06:51 PM.