Ngc 253

[Terere (Dom)]

First test run getting a guided shot. This is one frame straight from the camera (well compressed a good deal when I moved it from my camera to my phone)
Esprit 80, Fuji X-M1, 8 minutes at ISO 200, some light pollution.

Previously I was lucky to get 90 seconds, so I'm feeling like I'm getting somewhere.

[xelasnave]

And you should be happy with such a fine result.
Get a few more do a stack and procees and I think you will have arrived.
Great effort.
Alex

[ZeroID (Brent)]

Yes, excellent start. Get some more and add them up.

[doppler (Rick)]

That's a great start, nice pin point stars so good focus and tracking. My only question is why go so low with the iso? Most camera's have a "sweet" spot re iso below which you greatly increase exposure time with little gain in lowering noise levels. My canon 1100d is best at 800 iso.

[Camelopardalis (Dunk)]

Great start Dom, good to see another Fuji user

The sweet spot for the Fujis tend to be at ISO800 (pure coincidence with some Canons, the sensors are not related). You'll see a lot more signal at 800 and no more noise, and you'll be able to get away with shorter exposures.

[Terere (Dom)]

Originally Posted by doppler

That's a great start, nice pin point stars so good focus and tracking. My only question is why go so low with the iso? Most camera's have a "sweet" spot re iso below which you greatly increase exposure time with little gain in lowering noise levels. My canon 1100d is best at 800 iso.

I was just seeing how long I could get an exposure for this as a test, just kept halving the iso and doubling the exposure till I got to the lowest iso setting on my camera to compare results.

In the full resolution there are tiny little tails on the stars at all exposures. Not sure if that's just a bit of wind or some movement between the T adapter and the camera body. Any good suggestions on some really thin material I could make a shim with to see if that changes anything?

[doppler (Rick)]

A little tail would suggest some sort of vibration on one axis, I have had that happen on occasion with a slight breeze. Guiding errors just tend to make stars oval shaped. Aluminum cans are pretty thin and make good shim material.