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Full frame is around 36mm x 24mm.
If its the 50 megapixel camera then the file sizes would be horrendous to process.
Interesting to see what changes Nikon made to the 810a. Obviously there is a market here as Nikon is moving into the area held by Canon.
I am sure its more than just bragging rights.
I don't how well these astro models stack up against a straight Baader conversion though. Perhaps someone can post about that.
As far as I can tell the only difference is a more Ha friendly filter on the sensor.
What would be cool is the ability to do exposures longer than 30 seconds without using bulb mode. I don't know why they all do that. Olympus is the only one I know of that doesn't.
Also Oly has that great view it as its being taken feature where you can see the building long exposure on the LCD as its being taken. That could help in judging the ideal exposure length.
In general sensor, read noise, ADC noise and noise overall seems to be falling as newer models come out. So it means the DSLR will still have a strong place in astrophotography in the future.
Greg.
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