I want to get some shots, nothing super detailed with surface features, just edge-sharp images showing the progression of the event.
I practiced tonight a little, just to see if I could even get close. With a stack of three ND filters over my 55-200 lens, at f22 and 1/4000, the images are fairly encouraging. I wasn't taking notes, just trying different settings to see if it was possible, tomorrow I'll take more time and notes and nail down the exact parameters.
I need to do that because in about half the images there is a prominent ghost, but in some there isn't any. Not sure why but have a couple theories- where the sun is on the frame, zoom level, etc.
Now the questions:
I love trying time lapses, but any wider than 55mm and the sun is tiny, and I don't think I would be able to capture 2 hours of sun movement without moving the camera at some point, and I've learned that is bad in a time lapse. I guess in an 8x10 or larger you could see the changes, but was hoping somebody has experience they can share.
Or, ditch the time lapse idea and zoom in for some frame filling images. Another big problem is focusing. Auto focus doesn't work. Obviously I don't look through the dslr eyepiece. I can get the sun on the frame, and I go from the stop and turn it incrementally, but no real difference in sharpness on the display until it is way out of focus. Is there a trick, or at f22 it won't make a big difference?
Lastly, as things dim down over the course of an hour, what would be the best way to plan for compensation of this. Do I remove filters or just use shutter speed and/or aperture to compensate?
Soooooo, any and all ideas, help, etc. is appreciated. I am an astronomy nut and am well aware of the dangers of what I am attempting. All prudence and precautions are being taken, rest assured.