Jump to content

sgl_imaging_challenge_banner_31.thumb.jpg.b7a41d6a0fa4e315f57ea3e240acf140.jpg

Basic widefield with a Camera and Tripod


Recommended Posts

No flash for sure. The flash only illuminates close by objects, so it would be a bit optimistic to try and illuminate objects light years away :).

You should switch to manual, use shutter speed option at the highest you can get without trails, around 30s when using a tripod and a widefield lens, also set a high ISO (makes the sensor more sensible to dim light).

Live view can be used before the shots to fine tune the focus. My camera (canon 450d) usually misses the auto focus so I usually switch to manual and set it to infinity with some minor tweaks using the live view. The shots themselfs are done with timer delay, to let the tripod stop any shaking from pressing the shutter botton, live view off, saves baterry, and I set it to do a sequence of a few fotos to stack later on.

PS-> My experience is limited, only had a couple of goes and managed some half decent results.

EDIT: same time post as John. ;)

Edited by pvaz
Link to post
Share on other sites
  • Replies 109
  • Created
  • Last Reply

Top Posters In This Topic

Top Posters In This Topic

Popular Posts

After various discussions in a photo forum, thus the references to lens sweet spots etc, I wrote this up. All you need for this is a Camera and a Tripod. I've done these with my Z2 and the 450d. The Z

For shots like these it is often worth looking out for earlier Canon EF prime lenses. The older ones without usm are often optically superb and were designed for larger 35mm-sized sensors but sell for

Hi John Thanks for the write up. I have been using something similar to remove light pollution from my widefields. I wrote it up on my website, but your write up is much better and more comprehensive

Posted Images

ok cool well we got RAW now got the Canon Zoombrowser EX installed now just got to figure out how to change it from jpeg to raw.

also we cannot seem to edit them in gimp or deep sky stacker because when we click on the file with the relevant pictures they are not in there.

Link to post
Share on other sites

just drag the raw files from zoombrowserEX straight into DSS, when the popup dialog comes up, select the type, i.e. lights for the image data. GIMP can't edit raw files, you have to use something like UFRaw to convert them for you to a format GIMP can understand. Even Photoshop doesn't directly understand raw format and has a pre processor for converting them (ACR - Adobe Camera Raw).

Link to post
Share on other sites

DSS is used for staking the images. Once stacked you save the image to a tif and load the tif into GIMP... then you can edit the curves.. I did put this in the tutorial at the beginning of the thread.

Link to post
Share on other sites
ok cool well we got RAW now got the Canon Zoombrowser EX installed now just got to figure out how to change it from jpeg to raw.

also we cannot seem to edit them in gimp or deep sky stacker because when we click on the file with the relevant pictures they are not in there.

You cannot convert a jpeg back into an unprocessed raw file. If you have only captured your images in jpeg format convert them to tiff files for processing.

Peter

Link to post
Share on other sites
  • 5 months later...
  • 2 months later...

After reading your tutorial, I am now itching to give this a go> I went outside about 45 minutes ago and thought, right now is the time but by the time I got the camera and tripod the clouds had rolled in "curses, foiled again!!!".

Is it necessary to have the lens at 18mm though? Or could it be zoomed in a bit?

Cheers

Steve

Link to post
Share on other sites

Steve, sounds about typical :eek:... As for the focal length... if you want to use 30 seconds or there abouts you need to be at the widest focal length you have, as you increase the focal length, so the exposure times come down. It's about 8 seconds at 50mm for instance. Try it and see how you get on, you'll need to work out what's the best exposure time for the focal length and point you're shooting.

Link to post
Share on other sites
  • 1 month later...
I have just discovered your post and it's exactly what I want since I do not have a telescope. I need to check whether there is a stacking program for the Mac.

Thanks again.

Cheers,

Austin

You can use Elements on a Mac and it lets you stack pics, for producing deep sky pics.

Link to post
Share on other sites
  • 1 month later...
  • 4 weeks later...

Very interesting :) I have captured a wide view of the stars with a Sony A200 DSLR and 18mm on the kit lens. Focussing wasn't a problem. I tried a series of photos at various exposures to see the effect. 30 secs was the best unless you want star traces, as has been said.

Years ago I used a Pentax Spotmatic film SLR and have several lenses from these days. I bought an M42 to A mount adapter to use the Pentax lenses with my Sony A200. Of course, the DSLR has to be on full Manual mode but these lenses are high quality and quite useful. Focal length is effectively increased by 1.5 times as the DSLR has a smaller frame area than 35mm film.

Regards

Gina

Link to post
Share on other sites
  • 1 month later...

I tried this approach with my Canon 450d. My kit lens' autofocus is broken so I had to manually focus but didn't do it too well I discovered when I imported the pics.

Never mind, at least I had some images to try in Keith's Stacker on the Mac. I tried the tutorial images and figured out what to do with those and produced a nice stacked image. When I try with my images though I can't get them to align at all well. I must be doing something wrong...ah well...will try again tomorrow.

Edited by engstrom
Link to post
Share on other sites

To be honest, the autofocus doesn't work on deep sky... so it doesn't really matter if it's broken. I'm afraid I can't help with Keith's stacker... I did look at it, but it can't handle raw. I use DSS in Vmware Fusion.

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
  • Recently Browsing   0 members

    No registered users viewing this page.

×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. By using this site, you agree to our Terms of Use.