PixInsight > Gallery

North America Nebula Region

<< < (2/2)

twade:
Sal,


--- Quote ---I've seen your last few posts and gotta say, beautiful images!
--- End quote ---

Thanks.


--- Quote --- Are you using any filters with your modded 5D2?
--- End quote ---

No filters are being used.


--- Quote ---How's the light pollution in your area?
--- End quote ---

I'm quite fortunate.  I only have a 90 minute drive to a very dark sky.  I measure the background at 21.78 SQM but this was contaminated by the Milky Way.  I look forward to taking some values later this Fall.  According to Clear Sky Charts

http://cleardarksky.com/c/RttBttORkey.html?1

it should be very, very dark.  :)


--- Quote ---I use a modded T1i and 70-200 f2.8 but haven't gotten results anywhere close to yours.
--- End quote ---

I'm sure my dark sky helps; nevertheless, I've found you need at least 20 light frames to get the signal to noise ratio at a respectable value.  This is shooting at ISO 1600.

Wade

northern_nights:
Wade and all, I'm jealous of your fabulous work!

I am new to astrophotography.  Currently using an Astro Trak w/ Nikon d7000 (85mm Nikkor f/1.4 manual lens).

Anyway, I have a few images stacked and processed using PI.  Don't laugh but remember the equivalent focal length is 127mm and I'm not using any darks, bias, or flats:

http://www.flickr.com/photos/79387036@N07/.   For my wide field, I use Tokina 11-16mm f/2.8 and Nikkor 35mm f/1.4.

How does one get very small sized stars?  I Morf them to death and they do get dimmer but not necessarily smaller.

Cheers,

Jan

twade:
Jan,


--- Quote ---Wade and all, I'm jealous of your fabulous work!
--- End quote ---

Thanks.  It's mostly the dark sky.  :)

You are getting good results without calibrating.  You could get significantly better results if you start calibrating your images, especially darks. ;)

You have some very nice images, I especially like your lightning photos.

The small stars are mostly the lens I use.  The Canon EF 200mm f/2.0L is four inches in diameter so it has excellent resolving capabilities.  You also need excellent guiding.  I'm fortunate that I own an Astro-physics 900GTO mount which tracks very accurately.  Using the right processing techniques help too.  You should always protect your stars while using any kind of noise reduction. 

Wade

lromero:
Hi Wade,

Very good job, very well processed. Congratulations.

I have one Canon 5DII but unmodified, and I was wondering there is too much diference between the modified and unmodified?

I have the new Canon 60Da and the results are very good, so I have a doubt to modify the 5DII or not.

Best Regards.

Lluís Romero.

twade:
Lluís,


--- Quote ---Very good job, very well processed. Congratulations.
--- End quote ---

Thanks.


--- Quote ---I have one Canon 5DII but unmodified, and I was wondering there is too much diference between the modified and unmodified?
--- End quote ---

There is a definite difference, especially in the red spectrum.  The original Canon filter blocks 80 percent of h-alpha.  As a result, it would take a lot of images to compensate for the decrease.  I would caution against getting your camera modded if you only have one.  A modded camera has a significant red casts.  If shooting terrestrial scenes you will need to create a custom white balance.  In summary, it does make a difference, especially as a time saver; however, I recommend having two cameras: one for everyday photography and one for astrophotography.


--- Quote ---I have the new Canon 60Da and the results are very good, so I have a doubt to modify the 5DII or not.
--- End quote ---

It should work just fine.  You just have a smaller FOV which can be compensated by doing mosaics.

I hope this helps,

Wade

Navigation

[0] Message Index

[*] Previous page