I have managed to take clear moon shot before, but lately with my 55-200mm lens I get a blue hue over or around the moon, spoiling the image and I dont know why it does this.
Tonight we have a lunar eclipse taking place. I took a shot freehand with my small lens and it has come out clearer than the larger and without the blue hue. Can anyone enlighten me as to what the blue hue might be (I think its imitating the moon) and why Im getting the shading of the moons craters on the smaller lens and not the larger?
Your comment that 'it's imitating the moon' makes me wonder if it could be internal reflections from a filter on the front of the lens. Do you have a UV filter on the lens that you might not have used on your previous shots?
Even the most expensive anti-reflective filters can cause all sorts of nasty effects in high-contrast night scenes, like moon photography. A particularly bad example of it can be seen here (not my photo):
@abirkill Thanks Alexis for your feedback. I do have uv filters on both lenses but what you are describing and the image on flickr are similar to what I have experienced. It is unusual that it does it on one and not the other, but from memory I think I bought the UV filters at different times from different shops...so may explain it. I guess next time I attempt the moon I could swap the filters over and see if that helps. I really appreciate you taking the time to answer and help out on this one. :)
@dmortega Thanks for taking the time to help with my dilema. I think Alexis has hit it on the head as this seems very similar to what Im experiencing, thanks again. :)
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Chromatic aberrations
Your comment that 'it's imitating the moon' makes me wonder if it could be internal reflections from a filter on the front of the lens. Do you have a UV filter on the lens that you might not have used on your previous shots?
Even the most expensive anti-reflective filters can cause all sorts of nasty effects in high-contrast night scenes, like moon photography. A particularly bad example of it can be seen here (not my photo):
http://www.flickr.com/photos/nottybug/2867070691/
This is one of the reasons I tend to avoid using a UV filter, and instead use lens hoods as a way to protect the front element my lenses from damage.