ZWO ASI178MM Monochrome Camera

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Re: ZWO ASI178MM Monochrome Camera

Post by EGRAY_OBSERVATORY » Sun Nov 08, 2020 9:15 pm

As has just been said by Rainer, absolutely do not waste your dosh on tilters - unless there is no other way of stopping the NR's from ruining images.

Try the camera first on any of your telescopes, as different scopes may-well give different performances. Only when you have worked-out what is your best camera/telescope arrangement (or indeed any particular camera/telescope arrangement), will you then need to decide if either any focal-reducers/tele-extenders(Barlows) or for NR's - a tilt-adapter maybe required for any particular arrangement...

Of course there is a wealth of experience on Solarchat, but start and keep to the basics first - before ascending in the realms of the more expensive gear - which may never get used...

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Re: ZWO ASI178MM Monochrome Camera

Post by Starry Jack » Sun Nov 08, 2020 9:21 pm

He will need a UV IR CUT filter, true?


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Re: ZWO ASI178MM Monochrome Camera

Post by EGRAY_OBSERVATORY » Sun Nov 08, 2020 9:24 pm

Indeed that could well be correct Jack, but that can be acquired in due course...

Terry



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Re: ZWO ASI178MM Monochrome Camera

Post by DeepSolar64 » Sun Nov 08, 2020 9:28 pm

I bet ZWO carries these rings.


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Re: ZWO ASI178MM Monochrome Camera

Post by DeepSolar64 » Sun Nov 08, 2020 9:31 pm

Starry Jack wrote:
Sun Nov 08, 2020 9:21 pm
He will need a UV IR CUT filter, true?
I have an eyepiece mounted one but not so sure if it will work on the camera.


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Re: ZWO ASI178MM Monochrome Camera

Post by EGRAY_OBSERVATORY » Sun Nov 08, 2020 9:35 pm

Patience James is the word, as wait until the camera arrives and you can try it out on the various telescopes.

Then maybe is the time to decide on whatever else is required.

Only get what is required.

Terry



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Re: ZWO ASI178MM Monochrome Camera

Post by rsfoto » Sun Nov 08, 2020 10:25 pm

Starry Jack wrote:
Sun Nov 08, 2020 9:21 pm
He will need a UV IR CUT filter, true?
Hi,

May I ask what for ? Perhaps for White Light yes but I recommend to start simple and then grow.


regards Rainer

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Re: ZWO ASI178MM Monochrome Camera

Post by rsfoto » Sun Nov 08, 2020 10:42 pm

EGRAY_OBSERVATORY wrote:
Sun Nov 08, 2020 9:35 pm
Patience James is the word, as wait until the camera arrives and you can try it out on the various telescopes.

Then maybe is the time to decide on whatever else is required.

Only get what is required.

Terry
Hi,

An accesory which I really recommend is to motorize the focuser. Observing visually is completely different as the Eye adapts to unsharpness but a camera does not forgive unsharpness ...

James, you will make a new experience when you see in the PC monitor how the hot air waves pass over the surface of the Sun.

Focusing is one of the most critical things for good imaging. :o


regards Rainer

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Re: ZWO ASI178MM Monochrome Camera

Post by DeepSolar64 » Sun Nov 08, 2020 10:54 pm

Can you motorize an helical focuser?


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Re: ZWO ASI178MM Monochrome Camera

Post by rsfoto » Sun Nov 08, 2020 11:04 pm

DeepSolar64 wrote:
Sun Nov 08, 2020 10:54 pm
Can you motorize an helical focuser?
Yes but more difficult and that is normally a DIY action.

https://www.youtube.com/watch?v=_S2rpBx2zNI

make a search with the help of Uncle Google ...

viewtopic.php?t=27941


regards Rainer

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Re: ZWO ASI178MM Monochrome Camera

Post by EGRAY_OBSERVATORY » Sun Nov 08, 2020 11:46 pm

Can i under-line what Rainer has said about "Focusing is one of the most critical things for good imaging."

100% agree with that which is the first thing to get right first.

Because of my difficulties of seeing at a distance the smaller laptop's screen, i decided to invest in a 'high-end' computer (not a laptop), plus it's ability to supply two monitors (one hi-res). One can be swung-out close to the telescopes allowing much better focusing etc. and in bright Sun-light...

In fact my indoors laptops all have large screens and or an external large monitor...

I'm not suggesting that you need to go that far, but it certainly has made my Solar-imaging life - much easier...

Cheers
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Re: ZWO ASI178MM Monochrome Camera

Post by DeepSolar64 » Mon Nov 09, 2020 12:21 am

I have a large monitor on my desktop PC. That would be an advantage of an observatory. One could use a desktop with a bigger monitor than what is available on a laptop.


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Re: ZWO ASI178MM Monochrome Camera

Post by DeepSolar64 » Mon Nov 09, 2020 4:59 am

I have already figured out how critical focusing is with digital solar photography. Ha is a pain to focus using my iPhone and DSLR and even white light lacks the sharpness my eye can see.


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Re: ZWO ASI178MM Monochrome Camera

Post by KMH » Mon Nov 09, 2020 5:58 am

Starry Jack wrote:
Sun Nov 08, 2020 9:21 pm
He will need a UV IR CUT filter, true?
Does this make a difference for narrow-band solar imaging? I recently got one for color planetary imaging but haven't tried it for Halpha.

Kevin



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Re: ZWO ASI178MM Monochrome Camera

Post by Rusted » Mon Nov 09, 2020 3:37 pm

I also agree on holding off on the tilt adapter unless you find you really need one.

______________________________________

Thanks for the heads up on Exposure V Gain. :bow

My theory is that a shorter exposure will freeze thermal agitation more than a little Gain will ruin an image.
The truth is I have no clue where my 7ms max figure came from. I probably read it in a post here and it just stuck. ;)
It works for me while still enjoying low gain. I was seeing 150fps average in the last imaging session. [ZWO'174]
With the SharpCap Gain slider still well to the left despite my using my under 7ms exposures.
Needs more work methinks. I do note a definite slowing down in SharpCap reaction times using longer exposures.


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Re: ZWO ASI178MM Monochrome Camera

Post by Rusted » Mon Nov 09, 2020 3:52 pm

DeepSolar64 wrote:
Mon Nov 09, 2020 4:59 am
I have already figured out how critical focusing is with digital solar photography.
Ha is a pain to focus using my iPhone and DSLR and even white light lacks the sharpness my eye can see.
I use a large 25" computer monitor with my 15.6" high res. laptop.
This provide a huge image on a low reflection screen which allows sharp focusing.
Despite the 1:10 slow motion focuser it still takes patience to find sharpest focus!

Being in the darkness of the black finished dome interior kills most reflection problems.
I always wear black clothing when imaging to avoid any direct screen reflections.
Of course this set-up will not apply to most solar imagers. Though dark clothing still helps.
As does choosing to be in the shade when staring at your imaging screen.

One can buy loupes for cameras and phones.
A magnifying glass is clipped onto the capturing device with a little hood just like a camera viewfinder.
It blocks external screen reflections and provides extra magnification for focusing.
iPhones [and perhaps others] also have a "Loupe" magnification feature] to enlarge the screen.


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Baader 160mm D-ERF, iStar 150/10 H-alpha, Baader 35nm H-a, Beloptik KG3, PST etalon, Lunt B1200S2, Assorted TS GPCs, ZWO ASI174.

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Re: ZWO ASI178MM Monochrome Camera

Post by Alto » Mon Nov 09, 2020 3:57 pm

Ironic really. To view the Sun it's better to be in the dark as much as possible.... :D


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Re: ZWO ASI178MM Monochrome Camera

Post by rsfoto » Mon Nov 09, 2020 6:16 pm

Rusted wrote:
Mon Nov 09, 2020 3:37 pm
I also agree on holding off on the tilt adapter unless you find you really need one.

______________________________________

Thanks for the heads up on Exposure V Gain. :bow

My theory is that a shorter exposure will freeze thermal agitation more than a little Gain will ruin an image.
The truth is I have no clue where my 7ms max figure came from. I probably read it in a post here and it just stuck. ;)
It works for me while still enjoying low gain. I was seeing 150fps average in the last imaging session. [ZWO'174]
With the SharpCap Gain slider still well to the left despite my using my under 7ms exposures.
Needs more work methinks. I do note a definite slowing down in SharpCap reaction times using longer exposures.
Hi Chris,

Do you like the definition of my H-alpha images ? OK, they could be better and I will make some tests using short exposures times and increase gain in my camera. I already did it and did not like it but now that I have more time it does not do any harm to test it our again.

The exposure time right now for all the past H-alpha discs you have seen are around 46 ms to 52ms and neutral Gain. My Oldie camera does not make more then 16 frames per second at my chosen ROI of 904 x 904 pixels. The full image size is 1616 x 1216 pixels and there tha camera makes just ridiculous 12 frames per second at 12 bit. It is a Lumenera Infinity 2-2M microscopy camera ...

The white light images are shot at 82 frames per second with 8ms to 10 ms at a ROI of about 1196 x 1040 pixels or something with an ASI 290MM Cool.


regards Rainer

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Re: ZWO ASI178MM Monochrome Camera

Post by DeepSolar64 » Mon Nov 09, 2020 6:44 pm

It's here!

ZWO Monochrome camera.JPG
ZWO Monochrome camera.JPG (2.41 MiB) Viewed 346 times


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Re: ZWO ASI178MM Monochrome Camera

Post by Rusted » Mon Nov 09, 2020 8:57 pm

Christmas came this early? :shock:

You had better wrap it up again and wait for Santa to deliver it! :mrgreen:


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Re: ZWO ASI178MM Monochrome Camera

Post by DeepSolar64 » Mon Nov 09, 2020 10:09 pm

NOT!! :lol:


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Re: ZWO ASI178MM Monochrome Camera

Post by EGRAY_OBSERVATORY » Mon Nov 09, 2020 11:47 pm

OK if you have a gap for Sun-light James (at this time of the year), whereas I am limited to just a few minutes from the observatory, so am setting-up for some WL imaging elsewhere in my long-garden, using the very-portable R2 and possibly a Vixen GP-DX mounted 114 Reflector or one of the other scopes available.

I also received an early Xmas present today, as the recorder for the R2, so just sorting-out a suitable small flight-case for all that gear.

Rusted talking about a large monitor, hi-lights what I said earlier and to have or get the matt-screen on any monitor (laptop or otherwise) is a must and especially for Solar-imaging - unless of course one has a separate "warm-room" in an observatory. I have a black-curtain warm-section in my observatory and especially with the "matt-screen" well-prevents the Sun-light from interfering with focusing etc., now...

There is also no white or bright paint on the walls of my observatory, in fact no paint at all !! So it is quite dark at night, with just some dim red-light LED's + other red-lighting etc., whatever is required at the time...

Have fun and enjoy your new-acquisition..

Terry



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Re: ZWO ASI178MM Monochrome Camera

Post by DeepSolar64 » Tue Nov 10, 2020 4:29 am

Thank you Terry. I do look forward to this. My biggest difficulty is gonna be my altazimuth mounts.

Does anyone here ever do eyepiece projection? Placing the camera behind an eyepiece. This is what I do with the iPhone and have had some success doing this with my Nikon DSLR. I have no idea how you would support the camera on the eyepiece. Phones have mounts to hold them to the eyepiece. I used a .965 kellner eyepiece which I placed inside the BF on the Coronado and placed the snout adapter over it with the DSLR. It worked. I got the proms on the limb and a little mottling. I posted those back in the summer. One is my only SPOD to date. Ok, Alexandra probably felt sorry for me! 😂


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Re: ZWO ASI178MM Monochrome Camera

Post by DeepSolar64 » Tue Nov 10, 2020 5:20 am

I should have posted this thread in the Camera/equipment section. Maybe Mark or Alexandra can move it there for me. Sorry.


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Re: ZWO ASI178MM Monochrome Camera

Post by Montana » Tue Nov 10, 2020 10:05 am

James, the camera should come with a snout which fits inside an eyepiece holder, my ASI did. You shouldn't do eyepiece projection, just remove your eyepiece and pop it in instead. Always best to find the Sun with the eyepiece first, then do a straight exchange and the Sun should be in the field of view.

Alexandra



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