Sky_Watcher BK P250 OTAW Dual Speed + Sky-Watcher EQ6-R

 Posted: May 19th, 2020
Technical Info
 Pgt Aktyubinskiy, Russia
2485
A new season with new equipment.
Resolution: 3024x3024 px
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Wow! Awesome gear!!!
13 Jul, 2020 Reply
Overload!
25 Jul, 2020 Reply
Olegin_geolog Replied to Peter Tiagunov
No. I checked. The tube with all the accessories is 17-18kg. The mount handles up to 20kg without any issues. It gives 5-minute guided exposures with no defects at all. 10 minutes would probably work too, but I haven't tried it.
25 Jul, 2020 Reply
Peter Tiagunov Replied to Olegin_geolog
You are not calculating correctly. EQ6R-Pro payload capacity is 44 lbs = 19.96 kg. 19.96 / 2 = 9.98 kg. Two counterweights are included, each 11 lbs = 2x11=22, half of 44, or 9.98 kg. I consulted with them before buying the telescope.
26 Jul, 2020 Reply
Olegin_geolog Replied to Peter Tiagunov
No, again. There is also the extension arm! The EQ6-R has an extension bar. Two counterweights at the end of the bar + the extension bar itself can balance 18-19 kg... Plus, I also have a small 2.5 kg weight disc. With it, even with a full setup, I move the counterweights far from the edge, so there's even some reserve left... The telescope is fully balanced on both axes; otherwise, imaging simply wouldn't be possible.
Here's a timelapse of the telescope setup: https://www.youtube.com/watch?v=CC5N0AtI00k
26 Jul, 2020 Reply
Olegin_geolog Replied to Peter Tiagunov
I've been observing and photographing for years now... I've had many telescopes and mounts. I know how everything should be.
26 Jul, 2020 Reply
Peter Tiagunov Replied to Olegin_geolog
It's all about the counterweight arm. They explained it very simply: on one arm, you have a maximum-length bar with 10 kg at the maximum distance; on the other arm, you can put as much as will fit.
It might fit 20 kg. You have three weights, so two weren't enough. I really wanted a telescope with a 300 mm aperture, but it was too heavy. You could overload it, of course, but then the lifespan and warranty would suffer, though it would probably still work.
26 Jul, 2020 Reply
Peter Tiagunov Replied to Olegin_geolog
Your last comment reminds me of the story about the Japanese super-saw and the Soviet lumberjacks!
26 Jul, 2020 Reply
Peter Tiagunov Replied to Olegin_geolog
Please upload a screenshot from PHD2, 200-400 samples.
26 Jul, 2020 Reply
Olegin_geolog Replied to Peter Tiagunov
https://yadi.sk/i/-JKgF5EgEUQJAA
This is a very good polar alignment. Usually around 0.7.
26 Jul, 2020 Reply
Olegin_geolog Replied to Peter Tiagunov
Two were enough for me. The third one is for convenience. Plus, it has a dovetail for a small telescope or camera.
26 Jul, 2020 Reply
Peter Tiagunov Replied to Olegin_geolog
What are you guiding with? It's not clear/visible in the photo.
26 Jul, 2020 Reply
Olegin_geolog Replied to Olegin_geolog
Sky-Watcher 804, 80mm fast achromat. Datyson T7C camera.
27 Jul, 2020 Reply
Peter Tiagunov Replied to Olegin_geolog
I had a similar setup, only with a Meade LX200 SC telescope + Meade 80 Infinity 400 mm + 2x Barlow with a flip mirror and a 20 mm 70-degree FOV eyepiece with a reticle.
I usually couldn't guide better than 0.7" arcseconds; it was typically around 1".
With the new RC-10 telescope, I had to remove everything to lighten the load, keeping only a laser pointer and OAG.
As soon as I switched to OAG, guiding accuracy immediately became twice as good.
Here's my current setup: https://deepskyhosting.com/wiy7Z3i
Awesome video!
27 Jul, 2020 Reply
Olegin_geolog Replied to Peter Tiagunov
Good
28 Jul, 2020 Reply
Olegin_geolog Replied to Peter Tiagunov
Good camera. I'm not getting a coma corrector yet. I have a DSLR, and it's tricky to get the back focus right with a coma corrector... You might guess wrong and get the wrong coma corrector. And I don't have the money for it right now. )))
28 Jul, 2020 Reply
Peter Tiagunov Replied to Olegin_geolog
Oleg, please give me a like on M33 if possible.
Don't be stingy.
It's still better than yours. And I gave you 2 likes!
7 Oct, 2020 Reply
Overload!
25 Jul, 2020 Reply
Peter Tiagunov Replied to Peter Tiagunov
There is an "intermediate" solution, but I haven't implemented it yet. I bought a titanium tube with a 2 mm wall thickness to replace the standard counterweight bar. The lever arm will be 10 cm longer, but the total weight of the bar with two counterweights will not change.
26 Jul, 2020 Reply

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