Askar V on GTi Sky-Watcher Star Adventurer GTi · Bill Lincoln · ... · 5 · 247 · 0

BLinc117 0.00
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So I am new to astro photography,  my first setup is:
Star Adventurer GTi
135 Rokinon F2
ASI 2600MC-Pro
ASI 120mm Guide Cam w/  ZWO 60mm guide scope
ASI EAF
ASIAir Plus

Been having a lot of fun shooting wide field with the 135, but want something i can get closer with.    Really liking the idea of the Askar V, tho with the 80mm objective i can see it will push the upper limit of the payload capacity of the GTi especially with the guide scope, camera, dew heaters, eaf, etc.

Was wondering what sort of luck folks had running the GTi with the Askar V?   Ive seen some posts about putting an extension on the counter weight arm to allow you to balance it?

Thanks in advance for any feedback/advice!

Clear Skies!
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arminlks 0.00
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I don’t own the Askar V. But can tell you from my experience that pushing the gti to the limit will result in not satisfying results. I get elongated stars using the gti at the limit (with guiding). Would recommend to upgrade the mount before getting a new scope. Or get a lightweight refractor below 2kg.
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Ecliptico 2.41
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I would suggest you have a look at the Askar FRA400 and consider changing your guide scope for a smaller SVbony 30mm for your zwo 120. No need to add so much extra weight on a larger finder for wide field astrophotography. You will be within the reasonable weight limit for the GTI with expected good results
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cgrobi 7.16
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Hi Bill,

I took a look on the Askar V and it seems to be a very interesting scope. I do not own it, but I own the SA GTI and an TS 70/350 which is only 150g heavier than the Askar V. I agree with both of the repliers and would not recommend using this scope on the mount. But I am not only seeing black or white here. Even if the results may not be optimal, it might work to a certain degree. You have to make sure that you reduce the weight of your equipment on the mount as much as possible. The ZWO 60mm guide scope is overkill for your setup. The suggested SVBony 30mm scope is much lighter and should work up to a focal length of 500mm (or even more) just fine. Personally, I would also place the ASI air off the scope to reduce the weight on the mount. If there is no wind. This setup might work. If the weather is worse, it surely is problematic. The 60mm lens of the Askar V should work quite well. The 80mm lens with its 500mm focal length might be much more challanging. But the field of view with the ASI2600 should be wide enough to get pleasing images if viewed as people usually do with photographs or similar. But you might not zoom in and pixel peep in this case.

But keep in mind, that with all the additional accessories, the weight might be on the border of what the mount can handle at best. As already suggested, I would go for a bigger mount first. The EQ5-class can handle 10kg and carries the Askar with ease. But it still feels a bit flimsy to me. If you can afford it, go even 1 step higher to the EQ6 class and you are future proof for bigger scopes as well.

I know, this is a tough one. But the Askar isn't a cheap solution and spending 2 grands on a scope and later realize you can't handle it, is frustrating. But if you know about it, then buying the Askar and try it on the GTI is a good solution. If it does not work, you are prepared to buy a bigger mount as well. It's up to you now…

CS

Christian
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tjm8874 3.67
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Askar V looks great that "you can get every FL" but you can not get sharpness.
I agree everyone about 60mm guide scope is overkill.

I recommend new arrival SharpStar SQA55. 264mm f/4.8, 2.18kg, $695 (until 8/18).
I already ordered SQA55

Also there is FRA300 (300mm f/5 3.12kg) I own, it's great scope but bit heavier.
Redcat 51 250mm f/5 2.38kg $898 is very nice and proven.

For your next step-up,
ZWO FF80 Apo 80mm f/7.5 Telescope Bundle w/ AM3 Mount, Tripod & Pier Extension $2999 + 0.76 reducer $249
is 455mm f/5.7, incredibly sharp. I own akser version 80PHQ.

135mm -> 264mm -> 455mm is reasonable step-up to the deep sky.
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BLinc117 0.00
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Thanks for all the feedback!   Super helpful.   I think i have decided I am going to build and send a scope to Starfront, we get so few clear nights here!  Then I am going to convert my GTi to be a milkway rig for my dSLR!
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