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Venus - WARNING - not a very good image at all!


Sam

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mmmmm, this is extremely rubbish but it's Venus and I've never imaged Venus before so I thought I would post it. It's about 1200 equally rubbish frames stacked in registax. At least the phase is sort of visible:

10950_normal.jpeg

(click to enlarge)

Sam

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I've taken a few images of Venus. It's a lot easier in it's morning apperitions...

It's so hard to focus on, at least with the moon you get those moments of clarity to fine tune the focus - but Venus is really hard.

That a good image mate - phase shown well.

ant

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Rubbish you want rubbish look at my moon pics. :D

Come to think of it, it looks like my first moon pic :hello2:

Ahahahahaa, Bernie that made me LOL!

I have to say that this is better than any picture of Venus that I have ever taken.

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That's not rubbish, it's pretty good considering the current low declination.

Keep at it. Venus will be coming rapidly north over the next month, and with get much higher, the disk will get much bigger and the phase will diminish.

And of course there are details to image on Venus, but they generally only show in filters. You don't say what, if any, filter you used here.

David

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Filters for Venus is a complicated business, and different people have their own preferences. I would say any type of red filter, far red, H alpha, infra-red sharpens up the image a lot, but doesn't necessarily reveal any detail, though occasionally cloud patterns are shown in IR. I have found the Astronomik 807nm IR to be suitable for Venus (but not for much else).

The usual filters for showing the clouds of Venus are deep blue, violet or UV. These have to be IR blocked, or combined with an IR blocking filter. An ordinary visual violet filter stacked with an IR blocking filter can show features, but the result is normally not very sharp. There are a couple of specialised "Venus" filters on the market which pass only UV to show the clouds most clearly. The current 2" Baader one is a replacement for the earlier 1.25" Baader Venus filter, which was not much good as it let through too much IR. However, the 2" size seems inappropriate for planetary imaging, and also it seems overpriced, so I have not tried the new version. There is a Hutech-Schuler Venus filter in 1.25" which has a good reputation, but is difficult to get in the UK. I am currently asking Bern (Modern Astronomy) to look into it and get me a price for it.

If you image in two filters, say UV or violet and red or IR, you can produce a composite false-colour image which combines the sharper result from the red end with the higher contrast from the violet end.

David

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