My New Telescope (William Optics GT71 FPL-53 Triplet APO)

Hi All,
This video is related with unboxing of my new telescope (William Optics GT71 FPL-53 Triplet APO).
Specifications:
Aperture: 2.8" (71 mm)
Focal Ratio: f/5.9
Focal Length: 420 mm
Resolving Power: 1.62"
Limiting Stellar Magnitude: 11.1
Objective: Triple element air-spaced with FPL-53 glass
Dew Shield: Retractable
Focuser: 2.5" Rack & Pinion 360º rotatable camera angle adjuster with 1:10 fine focus and 1.25" adapter
Field Stops: Baffles
Mounting Hardware: Rings with Vixen-style dovetail
Tube Diameter: 82 mm
Dew Shield Diameter: 92 mm
Tube Length Fully Retracted: 325 mm
Tube Length Fully Extended: 427 mm
Tube Weight: 4.9 lbs.
Purchase Link in Australia : proastroz.com/
Video Shot with : Oppo Reno 10X Zoom Mobile
DSLR : Cannon 650 D

[@Wolfie6020]

Congratulations on your beautiful telescope. Williams Optics are quality through and through.

[@starstruckbyashwinchavan5378]

Thanks and indeed they are high quality ☺️

[@marhabanet]

Loved your review

[@starstruckbyashwinchavan5378]

Thank you so much.......😊

[@proastroz5759]

Hi mate! Great video and thank you for your purchase! We hope you'll enjoy it for years to come! One thing to note: with the flattener you need to adjust it to the GT71: here you need to set the flattener's distance to 9.1mm. To do that, you start unscrewing the black flange located right next to the T ring. You'll see a scale (similar to the one on the focuser when you rack it out): you adjust the distance to 9.1mm and then you bring the gold ring on the flattener in contact with the flange: this will lock it in place. The correct distance is critical to achieve a flat field. Thanks again for your purchase with us and please do not hesitate if you have any questions at all and if there is anything else we can assit you with. Please share your shots too :) Clear skies! - ProAstroz

[@starstruckbyashwinchavan5378]

Thanks Mate.........

[@amitdesai6310]

Awesome mate!

[@starstruckbyashwinchavan5378]

Thanks Mate

[@TheZ3roCool]

Nice gear...great video review :) Thanks for the time you took in making it!

[@starstruckbyashwinchavan5378]

Thanks for the inputs. Now am just waiting for some clear skies so I can show everyone what can this small beast can capture in the dark nights.

[@TheZ3roCool]

@@starstruckbyashwinchavan5378 Look forward to it. Been 2 months of Cloud here in UK 🥺

[@karunsabbarwal007]

Nice kit

[@starstruckbyashwinchavan5378]

Thanks Karun

[@mikebaxter6293]

Thanks, this helped with some of the issues I have run into with my new WO GT71. This is my first and I am having difficulty getting a quality image.

[@starstruckbyashwinchavan5378]

Let me know what exactly is the problem if I can assist you

[@mikebaxter6293]

@@starstruckbyashwinchavan5378 Thanks for the reply. I believe I have determined it is my settings on my star tracker. I totally misunderstood how to set Polaris on the scope. Thought it set in the middle and it actually sets around 4:30 on the utility clock where I am at. Will have to try again when it is not so bright from the moon. Lot more to it than I realized!

[@bobfletcher8196]

Superb video.

[@starstruckbyashwinchavan5378]

Thanks

[@starstruckbyashwinchavan5378]

Do subscribe for more videos

[@vishalspol]

Super Cool :)

[@starstruckbyashwinchavan5378]

Thanks

[@jyotirathod3003]

Nice video 👍

[@starstruckbyashwinchavan5378]

Thanks

[@LeorickChrome]

I just got this same one. My only complaint is that after installing the handle, the scope dew shield is now extended so far that I can't put it back into the carry bag without undoing the handle.

[@starstruckbyashwinchavan5378]

That's true

[@pissywilly]

Great stuff! I'm new and have an svbony sv48. Its been good to learn with but the quality isn't great. I'm very much looking at this WO as my next step also!

[@pissywilly]

I also wonder if an orion field flattener can be used with this WO scope because I already have one 🤔

[@starstruckbyashwinchavan5378]

Go for it because I also had the same svbony scope and the results were not that great hence I moved to WO GT71

[@starstruckbyashwinchavan5378]

The Flattener should be used of the same manufacturers because is the anatomy and optics if the scope can be matched better by them only. That is my opinion.

[@pissywilly]

@@starstruckbyashwinchavan5378 yes good point. Ill save my money up a bit more. Also nothing is available now because of covid. Everything is back ordered here in the USA

[@starstruckbyashwinchavan5378]

Check the William Optics website for the appropriate reducer and Flattener for your scope they have two or three types of them.

[@jasonmcintosh2632]

Thanks for a fun video. I hope you're enjoying your scope. Have you tried it with and w/o the field flattner? Does it make much difference?

[@starstruckbyashwinchavan5378]

The scope is really amazing with the quality but I have really not tried it without the reducer and definitely it will be on my list along with a DSLR.

[@LeorickChrome]

Sorry, so I did figure it out that it is intended to have this adjustment between the flatterer/reducer. Given that, what setting do you use to have the correct spacing?

[@LeorickChrome]

Quicky question. I just received my t-ring that fits my Canon 750d. I ran into the same issue you did at 11:00 in your video. In order to align the camera I had to fiddle with the field flatterner/focal reducer inner ring. I haven't had a chance (as always when we get them setup the clouds come), but does that adjustment have any effect on the imaging?

[@starstruckbyashwinchavan5378]

No

[@davidbrandenburg8029]

man I would love to have a nice apo, but I don't have any first born to sell!.

[@skipfranzese5667]

Very nice - I just purchased the same scope. Can you please tell me what guide scope and auto guide camera you are using? Thanks

[@starstruckbyashwinchavan5378]

Am using SvBony SV106 guide scope and ZWO 120mm Mini guide camera.

[@skipfranzese5667]

@@starstruckbyashwinchavan5378 thank you Ashwin!

[@NJ_Galactic]

Wouldn't it be off balance because of the weight of the camera? I have the same mount and it seems the balance would be off? Have you had issues?

[@starstruckbyashwinchavan5378]

Just move the scope towards the front and it should be fine

[@yervantparnagian5999]

One more question. I have a Nikon F mount DSLR. Once I figure out backfocus, does that mean the object I'm going to photograph, say the Andromeda Galaxy, will be in focus? Or do I still need to use the GT's focusing system to draw the focuser in and out to achieve focus? I'm thinking the backfocus distance is just to have a correct flat field for edge to edge star shape sharpness. However, it doesn't have anything to do with object focus correct? Thank you.

[@starstruckbyashwinchavan5378]

It's completely opposite to what you have mentioned the back focus is to bring the object in focus and has nothing to do with pin point stars edge to edge.

[@yervantparnagian5999]

@@starstruckbyashwinchavan5378 thanks so much for the fast reply. Being wrong is a relief actually. I can only imagine how back heavy our scopes would be with everything attached AND having to move the focuser out. I’m guessing the built in mask helps in making sure the back focus is correct too? If the backfocus is correct then the mask should show a perfect pattern.

[@starstruckbyashwinchavan5378]

Absolutely correct 👍

[@stormingbarney4498]

Great video - is it possible to lock the rotation?

[@starstruckbyashwinchavan5378]

Thanks for your comment :) Do you mean the Rotation of the camera sensor?

[@stormingbarney4498]

@@starstruckbyashwinchavan5378 Rotation of the focus tube - have since realised you can keep turning it until it locks in position. This is ideal so you don’t accidentally knock it before doing your flats.

[@starstruckbyashwinchavan5378]

This does not comes with a rotating lock but with the Crayford focuser there is a locking screw to hold the focusing draw tube in place and it does a good job even with a DSLR on a meridian flip.

[@danbarnett8604]

Is the carpet the best material to expose this equipment to?

[@starstruckbyashwinchavan5378]

Dan I seriously didn't get your point mate...lol

[@aztronomy7457]

I can’t get the 2” piece off to put on the reducer. Did you have to unscrew any of the screws? Thanks!

[@starstruckbyashwinchavan5378]

Yes you will have to unscrew it.

[@aztronomy7457]

@@starstruckbyashwinchavan5378 okay thanks. Which screws did you have to loosen? The ones attached to the ring?

[@starstruckbyashwinchavan5378]

Please do not unscrew any screws on the scope of you watch the video I have shown how to attach the field flattenner at 9.01 min of the video

[@yervantparnagian5999]

What is the length of the dovetail bar that comes with the scope? Thank you.

[@starstruckbyashwinchavan5378]

The dovetail is 200mm in length

[@yervantparnagian5999]

@@starstruckbyashwinchavan5378 I may be getting a longer one as the scope tend to get back heavy while achieving focus.

[@Sidecontrol1234]

I'm looking to upgrade to this scope, how are you finding it?

[@starstruckbyashwinchavan5378]

This one is really amazing it's apochromatic so it gives pin point stars with no chromatic aberration

[@josueantonioprietoolivares2342]

Do you have photos with this configuration???

[@starstruckbyashwinchavan5378]

Yes I have them and they are beautiful

[@josueantonioprietoolivares2342]

Thanks 🥺😍😍 where Can I see them?

[@starstruckbyashwinchavan5378]

I never posted them because I went for a OSC camera soon after buying this triplet APO.

[@LeorickChrome]

So based upon this diagram at www.cyclopsoptics.com/flattener-reducer/william-optics-flat6a-iii-0-8x-adjustable-reducer-flattener/ for our setup it requires 7.1 mm separation. Is this what you have figured out?

[@berndhepp9121]

Without a rotator? Very bad

[@starstruckbyashwinchavan5378]

I agree

[@RJ-vc2ju]

Nice scope, but boy, watching you assemble it on a dusty hairy carpet was making me cringe!!! You basically accumulated a year's worth of dust and whatever else all over the optics of that scope in the 30 minutes that it took you to make the video.

[@starstruckbyashwinchavan5378]

Lol....yeah I never thought of that.....