Wide Field Surprise

oxygn · Post by **oxygn** » Mon Jul 17, 2006 3:45 pm

hey WX,

where did you buy the step down ring?

Post by **weixing** » Mon Jul 17, 2006 3:49 pm

Hi,

where did you buy the step down ring?

I got it from John 3:16 in funan centre. I think they'll be kind enough to help you order one if they don't have stock.

By the way, to use a 2" filter, you need to step down to 48mm.

Have a nice day.

oxygn · Post by **oxygn** » Mon Jul 17, 2006 11:07 pm

k.. thanks i have 1.25" and one rear cell filter...do they have step down for these?

Thanks again

Post by **weixing** » Mon Jul 17, 2006 11:26 pm

Hi,

k.. thanks i have 1.25" and one rear cell filter...do they have step down for these?

I'm not quite sure about the diameter of the 1.25" and rear cell filter... you had to measure the diameter of the filter and ask them. But I think the 1.25" filter may be a problem... I don't think many people doing photography are using a 1.25" size filter on their SLR lens... it may be just too small to be useful, so I think the step-down ring should be very rare if exist.

Have a nice day.

oxygn · Post by **oxygn** » Tue Jul 18, 2006 11:23 pm

k thanks weixing

constellation389 · Post by **constellation389** » Sat Jul 22, 2006 9:12 pm

Hi Weixing,

It's encouraging to know that something like this can be achieved in Singapore - great stuff!

I have a question... When doing long exposure astrophotography in Singapore, is polar alignment a must (with us being so near the equator)? And if so, how did you manage this?

Post by **weixing** » Sun Jul 23, 2006 11:55 am

Hi,

I have a question... When doing long exposure astrophotography in Singapore, is polar alignment a must (with us being so near the equator)?

Yes... it a must no matter where you are on earth... unless you are taking star trail image.

And if so, how did you manage this?

I mount the camera on my Vixen GP GEM.

Have a nice day.

aquillae · Post by **aquillae** » Wed Aug 02, 2006 2:38 pm

I'm kindda wondering about the same thing since I'm going to be (hopefully) imaging from 6deg South (new territory, no star to point to, I assume).

Did you use a compass, roughly polar aligned the mount, and do drift alignment?

Post by **weixing** » Wed Aug 02, 2006 2:48 pm

Hi,

Did you use a compass, roughly polar aligned the mount, and do drift alignment?

Yes... first use compass the do a rough polar alignment then do drift alignment.

Have a nice day.

Post by **rcj** » Mon Aug 07, 2006 10:00 pm

Hi Weixing,
An encouraging result for Singapore! The gradients do seem to yearn for attention though. Is the zip file the raw JPEG version?