Sky-Watcher EvoGuide 50DX – 50mm Guide Scope APO Doublet Refractor – Lightweight Guide Scope – Easy Mounting – 50mm Astrograph

I got this for a guild scope, but it also works great with the Starzona field flattener for a lightweight imaging telescope. I found a 3D printed setup that clamps the scope and holds the mini computer, guild scope, and EAF focuser. There is a lot of backlash with the focuser, and I haven't gotten auto focus to work with this scope yet. There isn't enough backfocus adjustments to use with a star diagonal. I have also used it for electronically assisted astronomy with a camera attached, and with my ASIair for a go-to visual astronomy.

Solid high quality, total value, absolute top shelf, light years above the other popular name brands. I've got 4 other guide scopes, the Sky Watcher just made them nearly obsolete with Pin Point stars! My guiding star size got reduced by 3 times, the auto multiple star guide picked out a dozen stars and that's twice as much as my best night with the other 4 guide scopes. I use a ASI 120MM and a ASI 220MM, both had sharp stars to the edge, without optional reducer. My guiding total error dropped dramatically compared to my other 50MM & 30MM scopes! All of the above totally justified the price. The Vixen base and spacer is solid aluminum, but you lose that weight when you attach the finder scope base. Understand that naturally there is some slop in the focus ring, as with most every focus ring, similar to gear back lash, but once you tighten the focus lock screw, it holds! All 5 stars, my only disappointment is I should've purchased a long time ago and not messed with other Z-brand, S-brand or E-brand guide scopes. I rarely write reviews, but this guide scope earned it.

This little scope is surprisingly good for wide field astrophotography, but the field flattener (optional) is definitely required. I would give it five stars except that the focus mechanism (rather crude helix device) is (wow) not at all smooth turning to get really fine focus. You turn it one way a bit, then to fine focus back you have to turn several times to take up the "slack" in the crude system. You may have to do this back and forth several times to find optimal focus. But for astrophotography (at infinity) I generally only have to do this little struggle one time at the start of the evening. After that, it stays in focus for hours. Except for the tricky focus it is a fine little wide-field astrograph.

Not only is this an excellent guide scope (VERY well constructed), but it can be used as a wide-field primary with a deep space camera. I use a Telrad-like first approach to an object, then refine with this scope, and then (if all are reasonably aligned), all should be in view in the main scope. There are several YouTube videos on using this scope as a primary.

I bought this as my first scope for astrophotography as it was cheaper than the next best camera lens in this focal range. I 3d printed lots of custom equipment for it to transform it into a proper astrograph. Paired with the Starizona Field Flattener, it will provide a mostly flat field for three times less $$ than the WO RedCat51. This package isn't perfect though, straight out of the box you'll have pretty elongated stars, getting worse towards the edge. Either Starizona or Sky-watcher's own field flattener is necessary for AP. Additionally, the helical focuser isn't the best. Not the worst by any means (perfectly usable) but I wish it could be removed so I could upgrade it myself. The whole rear focuser end of the telescope seems to be cemented on. But... It's CHEAP!!! (in a good way)

Love this guide scope! Very well made and works great with my Sky-watcher evostar 100ed.

Used this scope with my ASI585 which yielded some amazing results considering the images were acquired in my bortle 7 driveway and were taken with an uncooled camera. The focuser is really stable so no need to refocus with a OSC camera. Well worth the $$. I wish I could afford to run three of these at once on my mount. That would be epic!!

My second identical scope. I have two big scope, One for guiding the biggy on an equatorial, other for taking wide field shots piggybacking my 10” LX200.

Como tubo óptico es Impresionante, mejoró mi sesión de astrofotografia a buen nivel. Unas capturas qie hice con este tubo óptico y una zwo ASI585MC. Un tubo óptico recomendable si vas comenzado en astrofotografia, requerirás aplanador

First if you don't have a tracking mount, I would suggest making that your priority over the scope. As a guide scope it is overkill, but for astrophotography it is a great cheaper option to a Red Cat and works great with DSLRs, mirror less and astrocams as long as the sensor is a APSC size of smaller. Also a very important note if you purchase a Field flatener (a must to really get the most out of the telescope) do not buy the skywatcher field flatener unless you are using a dedicated astronomy camera only as they do not have the required back focus for a DSLR or Mirrorless camera. For the back focus for all camera models it will require the Starizona EvoFF flatener and with the flatener in place it jumps the focal length up to 258mm. I suggest this scope to anyone getting into astrophotography simply because it can be a very expensive hobby and this scope is a great wide field scope that is nice and compact and portable that can be used as a guide scope with future setups, which could be done with a Red cat but at a fraction of the price. In the photos, Andromeda and the North America Nebula were captured using a unmodified Canon T3i (600d) and the Dumbbell nebula was captured using a ZWO ASI178mc planetary camera, as well as a photo of the complete imaging rig. Cheers and clear skies.

Very good quality I loved

Lo uso como telescopio para astrofotografía en compañia del aplanador de la misma marca. Funciona muy bien. El único pero es la distancia de enfoque que es exactamente la de las cámaras dedicadas de astrofotografía. Imposible alcancar enfoque con una DSLR y el aplanador de campo de skywatcher (existe uno de starizona que sí permite alcanzar enfoque con DSLR).

For what it is capable of, it's a really good scope for guiding. Add a field flattener and it does quite well for some imaging! The problems i have with this scope are: 1. the focuser knob can be quite difficult to make fine adjustments as it can get "stuck" resulting in needing to put extra force to turn the knob eliminating any kind of "fine" focusing. 2. The lens on the front has a couple areas of some sort of hardened clear substance around the lens. 3. Some of the screws that are used to screw the plate and riser block onto the tube ring is too tightly screwed on, resulting it some getting stripped. Overall, the guide scope is great and being able to use it as a small astrograph is a welcome addition. I expected a bit better quality control on the problems mentioned though, especially from a big name like Sky-Watcher.