Vroobel

15 minutes ago, TiffsAndAstro said:

Can't see me ever going mono and I don't want to buy filters before I get a osc.

I guess best I can do is use this as practice try and tweak my guiding.

I thought same one year ago. 

I tested the lens with the 2600MC camera till now. Yesterday I finished my Lion Nebula by collecting RGB stars, so it's possible to repeat the tests with 2600MM one. I'm going to perform the simple test with filters but without spacers. I'll give up if it fails. 

OCD, you say? 🤔 Another interesting thing today. I have to think about it next time when I run my cables. 😏

Thanks. Anyway, it was a breathtaking phenomenon and I'm more than happy that it happened over our heads and the weather was enough gracious. 😍

But it seemed to change rather dramatically, how far I'm from you in Liverpool? The 'source' was very high, but I cannot say that it was close to the Zenith. It was nearly between Arcturus and Alkaid. Interesting. 🤔

Beautiful! 🙂 Am I right in my conclusion that you weren't able to capture the exact 'source' of the pillars? I mean it looks like the lower latitude the more 'parallel' the pillars are. 

On 24/01/2024 at 14:36, Nigella Bryant said:

Just thought I'd post about the new Cq350 through the mount cabling. 

I have the following, 

1. Mount power cable. 

2. Hub powered USB cable . 

3. Hub power cable. 

4. Ecmod cable. 

Hub

1. Two power cables from mount hub to focuser.

2. Two usb3 cables from mount hub to two Zwo Asi 178mm cameras. 

All working and controlling from mini pc into warm room. 

I've tried to show the cabling flow in the pics. 

Oh, yesss, I like it! 🤩

31 minutes ago, TiffsAndAstro said:

Someone makes  a canon EF adapter for zwo cameras that can control canon lenses. I wonder if the adapter might magically fix this? Maybe the lens needs a electric signal to keep iris in position or something?

Cuiv lazy geek had a video on the adapter.

Yes, a Russian company called Astromechanics makes the ASCOM-controllable adaptors. Unfortunately, my assumption is to use this lens (and maybe Sigma 105 Art or 135mm Art in future) with ASIAir, that's why I didn't buy the Russian adaptor and used an EAF instead. I have to admit that it was really tempting me... Moreover, I really need filters under my Bortle 9 sky. The Canon 6D is kept for a darker sky. 

I cannot believe that one of the most experienced company like ZWO made their EF/M42 filter drawer wrong. As @Elp wrote, something else is going on. 

10 minutes ago, TiffsAndAstro said:

Do you have the lens wide open at f1.4? 

Yes - with Canon 6D I can do it easily. 

No - with 2600MC not. 

Every lens loses its distortion and aberration at a higher F ratio. But I didn't pay £629 for the top class cine lens to work with it at F/5.6 or higher. 

I'm not sure if I understood. Could you please explain it? 

After several approaches to the Sigma 40mm F/1.4 Art and the ASI 2600MC Pro cam with different apertures, I stopped my experiments at F/2.0 which still isn't perfect, but supported by the power of BlurXterminator, I can obtain nearly perfect stars.

I compared results of 50 x 15s subframes stacked with bias, dark and flat frames. The lens was joined with the camera with no spacers used and with 1.4 mm spacer in total which at F/2.0 seems to be a compromise between the aperture and star shape.  Each master file is presented as it is, with BlurX using 'Correction Only' and with BlurX using the following settings: 'Sharpen Stars = 0.15' and 'Adjust Star Halos = -50'.

Sigma 40mm @ F/2.0 - no spacer - IDAS LPS-P2:

Sigma 40mm @ F/2.0 - 1.4mm spacer - IDAS LPS-P2:

Sigma 40mm @ F/2.0 - no spacer - Optolong L-eXtreme:

Sigma 40mm @ F/2.0 - 1.4mm spacer - Optolong L-eXtreme:

As you can see, it's acceptable. 

Just at the end, another test of the lens joined directly to the Canon 6D (full frame) with no filter and with an FF OPTOLONG L-Pro filter looks as follows.

Sigma 40mm @ F/1.4 or F/1.8 - no filter:

Sigma 40mm @ F/1.4 or F/1.8 - OPTOLONG L-Pro:

Well, it looks like the lens works perfectly with the full-frame sensor, while use of filter brings distortions. The lens joined with the APS-C sensor using a dedicated 26.5mm thick ZWO filter drawer behaves strangely and becomes manageable af F/2.0 only thanks to sophisticated software.

I was advised to try it with another camera. I will do the test with my ASI 2600MM Pro camera ASAP which means when I finish imaging the Lion Nebula in SHO. Of course, I'll update the conclusion.

CS, 

I also have the Hercules 1.25" wedge. I've replaced the original ND3 filter (inside the eyepiece holder) with 1.25" Solar Continuum 10nm. Also, I screwed the 1.25" variable polarizing filter into my ASI 678MC camera nosepiece, because it's much easier to adjust the filter there than if it's elsewhere. 

https://www.astrobin.com/f3sum2/

4.15 am, it's time for flat frames. 

Hopefully, it's -10*C, but it depends on your ambient temperature. Usually it cools the sensor 30-35 degrees below the ambient temperature. 

Well, I changed mind and rearranged it again, but nothing significant. 🙂

The postman left my another parcel at wrong address. Anyway, thanks to @paul mc c I have 5th setup equipped with a Losmandy plate, now it's my 102ED F/11 planet killer. I had to enlarge two holes to adapt the plate to M6 thread at tube rings.

On 13/05/2024 at 18:24, Vroobel said:

Thanks for the info, I will look at the soldering iron too. 👍

I also work on my project, hopefully finished now. I got 2GT pulley and timing belt to drive a focusing ring of my Sigma 40mm F/1.4 Art lens. 

 

Finally satisfied. 😁

3 hours ago, 900SL said:

If you use ASI Air to go-to, it should plate solve after the go-to, and apply minor adjustments to center the target. 

... unless it's turned off in the mount config tab. I do it often when work on my projects at home, so no stars - no plate solve. 

3 hours ago, Ratlet said:

Have you made a post in the DIY section?  I love stuff like this.  Always really insightful.

Did I? I don't remember... 🤔🙂 Thanks. I changed idea and swapped the EAF with the guider, so I'm waiting for another 2GT belt now. 😁

Thanks for the info, I will look at the soldering iron too. 👍

I also work on my project, hopefully finished now. I got 2GT pulley and timing belt to drive a focusing ring of my Sigma 40mm F/1.4 Art lens. 

10 minutes ago, Ratlet said:

Looking to get practice in for soldering (for building an autofocusser and EQ platform) I've been ordering DIY kits from eBay.  I've been looking them over and Been cherry picking the ones with all the teeny surface mounted stuff attached so it's just through hole.

Imagine my surprise when I found these in the component tester kit that arrived today:

I think I might struggle.  Wonder if I can claim my money back since the pictures clearly showed this stuff on the board.

You have to buy a precise soldering iron and a dedicated microscope. 😏

One of many from Liverpool.

One of many pictures.

I was doing polar alignment and preparing for another session of the Lion Nebula. I was disgusted when I saw clouds. No, again? But the clouds were strange. Reddish? Pinkish? 🤔 Then I realised that it must be the announced geomagnetic storm. I never saw the aurora, so the first time is the one which I should remember all life.  

Liverpool...      

Something like that? 😊