[Logieberra (Logan)]

Arvo guys

I have been thinking about flats for months now. They have scared me off for some reason. It's time to 'just do it'.

I am using a Nikon D40 SLR (same CCD as the QHY8 I believe).

I realise that I can purchase a whiz-bang light box for $100+, or build my own, but I am also aware that people use white t-shirts effectively (pulled taught across the dew shield).

I am also aware that the focus and camera orientation must remain the same during image capture (at night), and when taking the flats the next day (or whenever the conditions are ideal!)

Let's talk about the t-shirts option. If you have, or continue to use the white t-shirt method - please chime in.

If you think your know how to do it, or only use light boxes... please reserve your comments.



What I would like to know:

• time of the day to shoot the flats;
• ideal conditions
• where to aim;
• how many explosures do I take;
• exposure length;
• what's this ADU business; and
• any other issues to consider / suggestions?

If I can walk away from this post, information in-hand, and start using flats I will be very pleased! Looking forward to it!


Cheers,

Logie