ChrisBeere

Ive not used it yet ! Up until recently i have been ok with the polarscope and i can just about squeeze 2 minutes at 105mm but i want to go to 3 minutes at f/2.8 with the 105mm for a mosaic i have ...

Ive used both the Astrotrac and Fornax wedges, all the Manfrotto geared heads and a few Benro geared heads over the years and while they all got the job done they were all underwhelming. The geared ...

Arca Swiss D4. Rig : https://www.astrobin.com/q0u7sn/?nc=user

I considered upgrading from my Fornax to the 360 but held fire. After talking to Richard I discovered that it only connects to the wedge natively and does not support a 3/8 Arca plate so I could ...

Ocean horizons are just so awe inspiring. I've been privileged to observe from some of the best skies on the planet down in the Kalahari and while they are truly breathtaking nothing beats island ...

Awesome capture !!

Yeah kinda similar to the temperatures that the Grumman Northrop command module experienced in the Apollo missions upon re-entry.

Thats just space rocks burning up in the earths atmosphere,

Yeah, for me the light pollution map, Google Maps, Google Earth, Google Earth VR are all essential research components when looking for dark sites.

I really like ultra wide angle lenses and the Sigma Art 14mm f/1.8 is my favourite. Its garbage wide open (at least my copy is), acceptable at f/2.8 and shines at f/4.0 Many will argue that ...

I wasnt suggesting the subs were over exposed, quite the contrary. I was merely reinforcing the point the previous poster made that overexposure will cause similar problems. Even without looking at ...

Yes overexposing will most definitely blowout stars.

The 35mm Art would be my choice but it will require you to mosaic as the FOV on APS-C at 35mm is pretty tight. You will need to stop it down to at least f/2.0 as even on a crop sensor the batwings ...

Don't worry about the darkness you can stretch the data after stacking it with curves adjustment. Better still use a colour preserving stretch such as ArcsinH.

The 1600 ISO sub has much better star colours you can clearly see reds and blues at 100%. Above 1600 the star colours are being nuked badly - there is a strong green tint to them. In conclusion you ...

Download RawTherapee and debayer a single sub using auto white balance and the default Amaze debayer and post it here. That will give us a good baseline to investigate. It is possible that 2500 ISO ...

How are you debayering the subs ?

Yes, I aim for a skyfog origin separation of 30-40 percent on my back of camera histogram. I shoot at ISO 1600 on my Canon 6D MK II because that's the sweet spot for swamping read noise with the ...

I shoot 3 minute subs at f/2.8 ISO 1600 for my mosaics with the Art 40 and 105. I shoot 5 minute subs at f/4.0 ISO 1600 for my mosaics and nightscapes with the Art 14mm I have shot them all wide ...

The problem is simply one of projecting a curved surface - the celestial sphere - onto a rectilinear one. It requires translating/rotating/distorting the elements of the mosaic to enable them to be ...