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Spiral galaxy question

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#1 WIZARD1325

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Posted 09 April 2020 - 09:02 PM

Spiral galaxy question Can I get a rough setting for Nikon D750 DLSR camera settings for the spiral galaxy rough settings to start off with, a starting point taking pictures for tonight thank you :-)


Edited by WIZARD1325, 09 April 2020 - 09:03 PM.


#2 mpaul73

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Posted 09 April 2020 - 09:17 PM

Err how about Bulb Mode, ISO 1600, RAW??



#3 17.5Dob

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Posted 09 April 2020 - 10:02 PM

"Roughly", ISO 400-800, and 30 second to 8 min subs depending on f-ratio and LP....



#4 WIZARD1325

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Posted 09 April 2020 - 10:11 PM

I have a CPC 1100 and it’s already struggling with star trails at seven seconds it looks very dim on my camera unless I bump the ISO to 3200 I noticed but still it’s not enough long exposure time at 400 ISO. I’m just getting bad star trails



#5 17.5Dob

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Posted 09 April 2020 - 10:49 PM

I have a CPC 1100 and it’s already struggling with star trails at seven seconds

 

LOL, good luck with that. Unless you have a focal reducer, you're going to need to shoot 10+++ minute subs at f10.

Unless you've deforked it and have it on a nice EQ8 or equivalent equatorial mount, field rotation from from the alt/az mount is going to prevent you from ever shooting longer than 15-20"

The scope/mount combo were never designed for AP. It's strictly built for visual use. You can eak some good planetary shots with it by using a dedicated planetary cam, not yur dSLR, but as is..it will be impossible to use for DSO photography


 


Edited by 17.5Dob, 09 April 2020 - 10:54 PM.


#6 Jetstarz99

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Posted 09 April 2020 - 11:04 PM

Spiral galaxy question Can I get a rough setting for Nikon D750 DLSR camera settings for the spiral galaxy rough settings to start off with, a starting point taking pictures for tonight thank you :-)

Here is a single 2 minute sub of M101. Canon 7D Mkii 

Green Zone, no filters no processing.

 

This was shot at ISO 2000, but the D750 probably has better noise performance

so I would be tempted to try 3200.

 

Let us know how things went.

 

Cheers

 

M101 Single 2 minute Sub


#7 WIZARD1325

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Posted 09 April 2020 - 11:12 PM

Yes I tried 32 and it was perfect the only problem I was having was star trails I was only able to take five second or three second exposures anything more than that I was giving star trails using my CPC 1100 on it’s Alt azmith mount.  Thanks so much. That is the exact test image I saw on my camera I was so excited I never got to see it before but it look like a normal star but when I looked zoomed in and looked closely it just had to be a galaxy you just verified that thank you.




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