Please - is this a suitable setup for astrophotography? :-)

Hi Jan, 

welcome to the hobby. I don't know about the quality of the refractor but the focal length is well suited for a lot of DSOs. The ASI 533 has a good reputation as well as the mount. L-extreme filter is somewhat controversial because it can lead to halos around stars but plenty of very nice images with this filter are presented here. So this sounds like a nice AP setup to start with.

On the other hand you may consider this thread and the links therein: Hello, I need some help to choose the right scope for me. - AstroBin
Learning curve in AP is quite steep so you may consider taking your first steps with camera + lens + mount/tracker. Maybe you buy the mount first and take it from there step by step. General advise is against starting with a very long focal length (see the link). The longer the focal length the more unforgiving the setup and the more experience required to handle it.

Have fun and clear skies
Wolfgang

Jan Klíma:
Tecnosky Apochromatic refractor AP 80/480 OWL Triplet OTA
ZWO Camera ASI 533 MC Pro Color
ZWO Filter Drawer 2"
Optolong Filters L-eXtreme 2"
SkyWatcher EQ6-R Pro mount

ZWO Asiair PRO with ZWO Guidescope 30mm mini + ZWO Camera ASI 120MM Mini Mono 

I'm sorry, I'm a photographer from the Czech Republic, but a newbie in astrophotography :-)

Am I missing an adapter or something?
Also I wonder if a telescope with a longer focal length would not be better ...
I also haven't found much experience with the Tecnosky OWl refractor - do you think it will be good? :-)

Hi Jan,

The focal length of the scope you selected is a very good starting point as Wolfgang already said. What you probably have to add is a corrector element (either a flattener or flattener/reducer combination). Check out if Tecnosky has one for your scope specifically.

CS,
Björn

General advise is against starting with a very long focal length (see the link). The longer the focal length the more unforgiving the setup and the more experience required to handle it.

Funny thing. I started with a 1800 mm focal length maksutov. Unguided too.

Pablo Petit:
Also, if you have some spare budget, you might want to upgrade to the ZWO ASI 294MC. It's not that much more expensive but you will have a significantly bigger sensor.

If I may add to it: I know the 294MC and MM sensors. They have a very strong amp-glow. For broad band imaging not so much of an issue but for narrowband. It doesn't always perfectly calibrate out. The 533MC apparently has amp-glow suppression (according to ZWO).
Personally, I'd trade the size for a cleaner sensor. 

Björn

Björn Arnold:

Jan Klíma:
Tecnosky Apochromatic refractor AP 80/480 OWL Triplet OTA
ZWO Camera ASI 533 MC Pro Color
ZWO Filter Drawer 2"
Optolong Filters L-eXtreme 2"
SkyWatcher EQ6-R Pro mount

ZWO Asiair PRO with ZWO Guidescope 30mm mini + ZWO Camera ASI 120MM Mini Mono 

I'm sorry, I'm a photographer from the Czech Republic, but a newbie in astrophotography :-)

Am I missing an adapter or something?
Also I wonder if a telescope with a longer focal length would not be better ...
I also haven't found much experience with the Tecnosky OWl refractor - do you think it will be good? :-)

Hi Jan,

The focal length of the scope you selected is a very good starting point as Wolfgang already said. What you probably have to add is a corrector element (either a flattener or flattener/reducer combination). Check out if Tecnosky has one for your scope specifically.

CS,
Björn

Hello Björn! Yep, that's also a big question for me - the field flattener => do you think it is necessary for ZWO 533 with small sensor in square format?

Pablo Petit:
Hello Jan,

Yes, as Björn said, do not forget to buy the reducer/corrector with your scope, I did that mistake long ago, its very frustating.
You also will need to make sure your backspace is correct, meaning that the distance between the exit of your reducer and your sensor is 55mm.
For that you may need some extension rings. 

About what Michael said, you need to make sure a RisingCam is compatible with your AsiAir if you want to go this way. I don't have one but I think they only work with ZWO cameras.

Also, if you have some spare budget, you might want to upgrade to the ZWO ASI 294MC. It's not that much more expensive but you will have a significantly bigger sensor.


Pablo

Hello Pablo! Yep, that's also a big question for me - the field flattener => do you think it is necessary for ZWO 533 with small sensor in square format? Backspace - yep, that's something I am worried about :-D

The sensor of ASI 533 is quite small (11x11mm), so Andrea's take on it that you don't need one seems justified to me. There are a lot of users on astrobin using this sensor: Search - AstroBin. You may look at some of the images and get in touch with those users to ask for their experience. Or you may just give it a try and judge on your own. You most likely will need a few "test sessions" to learn to know your equipment anyway.

Clear skies
Wolfgang

Unfortunately the RaisingCam is no option when you want to continue using ASIAir Pro. It's a pitty because the camera itself is a nice step up to the ASI533, 16bit adc and same pixel size but much more of those pixels, so a wider field of view.

One option to be future proof is to buy 36mm filters and adapters from 36mm to 2" (Available from Antlia), with 36mm you are good for Sensors up to APS-C size. And when the Astro Virus hits you hard it is easy to upgrade to a 7-position 36mm Filterwheel. (Speaking out of my own experience here), I started filter-wise exactly as you, with 2" L-Pro and L-eXtreme and the filter drawer, now those two filters are sold and I love the convenience of having the filter wheel (Yes, for a color camera….)

One thing I did not see on your list are UV/IR Filters for Guiding Scope and Main Scope. For Guiding scope you can skip this but a very cheap SVBony 1 1/4" Filter will do the job, the guiding stars are a little smaller.
For the main scope it is more important when you are on Bortle 3-4, there you can often get away without a L-Pro Filter (Reason I sold my L-Pro) but there I'd go for a Astronomik L-2 as a cheap solution that does the job to filter out that frequencies in the light that cause star bloat.