Telescope Ideas?

[Jimlau]

I have a Nikon D5500 with a 400mm prime lens (an older, MF one). Looking for a telecope to maybe improve imaging.

A scope needs to be <5lbs, >400mm focal length, and <$700. So far I have found these few. Are either better than the pothers, and would they be better than my Nikon lens?

-Sky-Watcher EvoStar 72 f/5.8 Apo (lightweight)

-Tecnosky APO 70/420 FPL53 (lightweight, tho more expensive)

-Astro-Tech AT70ED 2.8" f/6 ED

-SVBONY SV503 Telescope, 70ED F6

-Orion ED80 80mm f/7.5

Thanks.

 

 

 

Edited October 14, 2022 by Jimlau

[happy-kat]

Is your prime lens one of Nikon's ED glass lenses and what f stop can you use your lens at for imaging?

[Jimlau]

48 minutes ago, happy-kat said:

Is your prime lens one of Nikon's ED glass lenses and what f stop can you use your lens at for imaging?

It's the Nikon Nikkor AI-S 400mm F5.6 *ED Lens. I've gone with wide-open and f/8 with 45 second subs.

[Bluemoonjim]

TS Optics 72mm Photoline. 

https://www.teleskop-express.de/shop/product_info.php/language/en/info/p8866_TS-Optics-Doublet-SD-Apo-72-mm-f-6---FPL53---Lanthanum-Glass-Objective.html