Astro Essentials 50mm Guidescope / Finderscope
Astro Essentials 50mm Guidescope / FinderscopeAstro Essentials 50mm Guidescope / FinderscopeAstro Essentials 50mm Guidescope / FinderscopeAstro Essentials 50mm Guidescope / Finderscope

Astro Essentials 50mm Guidescope / Finderscope

  (7 Reviews)
✓ 2 year warranty


6x in stock shipped 1-2 working days

About this product

Model:  ae_50mm_guide_scope

The Astro Essentials 50mm f/4 Guide Scope is a good quality, compact, lightweight solution to guiding.

Works with most short-medium focal length imaging systems.

Has a looong focus range so is compatible with pretty-much all guide cameras either using push-fit in the 1.25" eyepiece clamp or attached to the integrated M42 / T thread.

Its wide field and fast f/4 focal-ratio ensures you will have no difficulty finding a suitable star to guide by. 

Supplied with 3-point adjustment rings for accurate alignment with your imaging scope or to adjust and find a suitable guide target and a 34mm dovetail mounting bar that fits Synta/Sky-Watcher-Style finder shoes or clamps.

Weighs around 600 grams. 


  • Wide FOV
  • 50mm Aperture, Fast f/4 focal-ratio
  • Fully Multicoated anti-reflection optics
  • 1.25" push fit & T2 connections
  • Smooth helical focuser for fine focusing and a sliding mechanism for coarse focusing offers flexibility and control
  • Compression ring eyepiece clamp won't mar your camera or eyepieces
  • 90mm long, 34mm dovetail fits most Synta/Sky-Watcher-style finder shoes & clamps
  • Adjustable guide rings with nylon tipped thumbscrews
  • Use as a guide scope or high quality finderscope by adding a suitable 1.25" eyepiece
  • Lens caps
  • Weighs around 600g.


Customer reviews

Average Rating (7 Reviews):  
Write a Review and share your opinions!

Rating (max 5):  
Does its job
30 January 2023  | 

I tried (and failed) with an OAG on my two scopes using a ZWO ASI585MC as main camera and ASI290MM as my guide. I decided to keep it simple and go back to a guidescope. This was simple to setup and although I havent used it extensively, thanks to the clouds, it just works. This coupled with the great price makes it a bargain.

Rating (max 5):  
Worth the wait
26 October 2022  | 

Although supply chain issues delayed it's arrival, I'm pleased with the look this relatively inexpensive guidescope. Thus far there's been no chance to use it properly, but the item itself is wholly fit for purpose. It's also worth recording my gratitude towards the staff at FLO for their amazing pre-sales advice and support - this alone will ensure I return again and again as a customer.

Rating (max 5):  
Nice upgrade to red dot finder!
10 March 2022  | 

After having an email chat with FLO (recommended to chat with these guys, their expertise shows and really helps) i decided to purchase this as a replacement for the red-dot finder on my Celestron EdgeHD 8".

The idea for this was to pair it either with an eyepiece to be used as a finderscope or with my ZWO ASI120MC-S camera for use as a guide-scope (which i had already). Although not the best camera for this task it was something for me to play around with having been new to guiding and so not wanting to spend too much at the first stage before i understand and think about buying something more expensive

To mount the scope i also needed a finder shoe/base and the Baader (2457000A) was recommended for my setup. The bonus was that i found an additional mounting spot for the red-dot...bonus!

The scope came nicely package. The focuser is stiff but a few turns and draws sorted that out; to focus you first pull/push the focus tube to acheive a rough position then fine tune with a twist: both rough and fine positions are locked with a thumb-screw.

1.25" eyepieces or cameras are attached by the nose-piece. Two screws keep these pieces in place and i never felt that it wasnt secure.

Alignment was easy with the 3 screws on each of the rings.

Viewing with the eyepiece gave a nice field of view, the only thing i need to make this even better would be to use an eye piece with a cross-hair.

As a guide-scope, i am still learning with PHD2 but i found the process with the software easy to do. The software finds a star without a problem and has managed to keep within 1 degree while guiding (with the astro-gods on my side!). I realise that this setup, and with the focal length of the scope, to be on the lower limit of what is achievable but i find its good for purpose and a great budget finder-scope/guider-scope. Easy to setup and wont break the bank

Rating (max 5):  
Excellent piece of kit
28 February 2022  | 

Excellent piece of kit, well engineered, easy to focus, light weight.

Rating (max 5):  
Lovely Guide Scope
08 December 2021  | 

Upgraded my ZWO 30mm to this one. Using the ZWO120MM Mini on it and it's a great match, much easier to focus that the ZWO.

Rating (max 5):  
30 November 2021  | 

Luckily I emailed FLO for some advice before purchasing a guidescope and guidecam. I almost bought one that wouldn't have been suitable for my set up. With the help and expertise from Chris I was able to make the right decision and learned a ton from him too in the process. I'm never disappointed with the service from FLO, it always exceptional.
The guidescope itself is very well made. I would urge anyone who is buying a guidescope or guidecam to use Flo's guiding calculator online or drop them a quick email.

Rating (max 5):  
01 April 2021  | 

well made, easy to focus . recommend


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