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Selborne

Skywatcher 100 ED Pro Esprit - Great Performance

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On 29/10/2018 at 08:35, SteveMunro said:

Hi Jamie, thanks for sharing your incredible Image. I have a quick question, if you don't mind, that is related to both scope and camera (i.e. I own A7rii and I'm wanting to buy the Skywatcher Esprit 100). What mounts are you using to attach the camera to the scope? I've been in touch with Bintel and, unfortunately this time, they are unable to give me the information I need so, as you are using both which I intend to use, can you please let me know how it all came together for you? All the best, Steve

Hi Steve,

I purchased mine from 365 Astronomy, Zoran there is very helpful, he calculated the tube length from the field flattener and put together a set of adapters which allow me to have a native sony mount adapter through to the M48 connection to the field flattener, it was not cheap the whole setup was about £60, but it is the right tool for the right job.

regards

Jamie

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You really just need to know, or find out, what the exact distance is from the mating surface of the lens, to the sensor.  For example, on Canon cameras this is usually 44mm, which means T adaptors for them are usually 11mm thick, giving you 55mm, which is the distance required for the SW field flattener.

You don't need to spend fortunes on custom adaptors, you just need to drop a line to Sony tech support and ask them what this distance is and then making up adaptors etc. is easy as you know the distance you're aiming for.  I've had a look and can't find this information, which is why I suggest dropping Sony Tech a line.

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Not sure if this helps, but here's a stack from mine at the (almost) default 63mm distance. I've added a .3mm shim to account for the filter, but that's it.

Esprit 100D -> Flattener -> Flattener to M48 -> 0.3mm shim -> Moravian 55mm back focus M48 nosepiece -> FW with Astronomik Ha (1mm) -> Moravian G3 16200

This is just over 5 hours of Ha - 32 x 600. I've done a teensy bit of NR, a few gentle stretches plus some local contrast enhancement. Stars untouched - but they are a little elongated in RA, my guiding RMS needs some work.

Can also post the CCD Inspector maps if that's of interest to people.

 

HA_quick_sgl.jpg

Edited by Big Jim Slade

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I was wondering if the dew shield has to be extended all the way ?? does it really makes a difference ?what if i remove it ?

Edited by Nikolas74
word mistake

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