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Panda Alvin

MAK 127 with DSLR on EQ wedged AZ GTI

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Posted (edited)

Title is a mouthful ...

Before we all get excited - I like to point out astrophotography is not my main objective and I certainly don’t expect good pictures at all. I just want to expand my knowledge, have some hands on experience & playing around with different setups. Edit: Oh I also know the scope its a slow F/11.8 and "Making Every Photon Count" is on my to buy list.

 

I mainly plan on getting a Mak 127 + AZ GTI for visual grab and go purposes (as you may have seen me briefly mentioned in my welcome post). However, I may later on like to try an EQ wedge + DSLR to have a dabble at astrophotography, and I have some questions that comes with.

First thing on my mind – Weight - My plan is to obtain a M12 x 300mm threaded coach bolt with 1KG counter weight, attached to the AZ GTI to reduce the overall torque required.  I know this will push the mount to its 5kg limit if I had the OTA & camera on, and review on the existing tripod is not great... Would this still be ok for short exposures (even if not eq wedged ?)

Second issue – polar alignment – Unlike the Star Adventurer, it doesn’t have a polar scope (well its designed to be AZ…). However, I plan to use my phone + app as a crude alternative, and know it won’t be 100% spot on. By having it loosely “EQed”, could I get away slightly longer exposure? For example 1 minute as oppose to 30 seconds ? Or would the star trailing just bad as without the EQ wedge ?  

Also are there any other concerns I need to know about I haven’t thought of and need considering ?

Cheers

Edited by Panda Alvin

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Posted (edited)

You'll need the pro version of the app to be able to use the azgti in EQ mode. I imagine the longer exposure length you mention would be possible with a camera and lens but the 127mm with the long focal length will push the demands and probably mean reduced exposure times but for planets and the Moon you would do short videos instead and wouldn't need the EQ mode or wedge.

Edited by happy-kat
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If you don't use the wedge then with a 127mm field rotation would be very noticeable quickly as altaz tracks in tiny left right up down movements. As a rough rule 500/focal length of telescope or camera lens before star trails.

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Personally I'd use the 127mm for visual then remove it and use just the camera with lens, wedge and maybe the star adventurer counter weight bar (if it fits as it can be bought on its own) . There is a member doing that/similar I'll add a link of I can find it.

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1 hour ago, happy-kat said:

Personally I'd use the 127mm for visual then remove it and use just the camera with lens, wedge and maybe the star adventurer counter weight bar (if it fits as it can be bought on its own) . There is a member doing that/similar I'll add a link of I can find it.

Thanks, I will probably give this a try instead when it happens.

Having thought more about my original post, it feels like every part of the set up isn't suitable for it. Slow OTA, awful alignment, wobbly tripod ... adding all those up, I really wonder what kind of messy blob it would come out as. 

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5 hours ago, Panda Alvin said:

Thanks, I will probably give this a try instead when it happens.

Having thought more about my original post, it feels like every part of the set up isn't suitable for it. Slow OTA, awful alignment, wobbly tripod ... adding all those up, I really wonder what kind of messy blob it would come out as. 

I dont think it will be all bad, the AZGTi with a Mak is a sound travel package but has its limits.

Alan

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