More APs

LT_5

Hi,

Here comes more APs taken in this NZ trip.

Image 2:  RHO

Canon EF85mm F1.8 @ F2.8 + modded EOS 350D @iso 400 RAW + GP photo guider, 9x360s unguided, taken at National Park Village on July 25th. No DF calibrated.

If there was no high cloud covered, I think I could do it better. But ...., before that, I have to acquire more processing skills.

LT

LT_5

3rd Image:  Small Magellanic Cloud

EF200mm F2.8L @ F2.8, iso 400 RAW, 4 x 180s unguided, no DF calibrated also. Very difficult to process it because of no FF applied.

LT

LT_5

The last one:  Our milkyway

Zoom EF17-40mm F4L @17mm F4 + modded 300D @iso 800 RAW, best 4 x 240s unguided.

That was the end of our AP in Gisborne

LT

mca

Dear LT,

I see the disadvantage of modifying 300D (or 350D) . While it is good to emphasize the red color of gaseous nebula,  it also makes the SMC too red !
(The SMC is not a red galaxy !)

I am still hesitating whether my 350D should be modified or remains as originally made.

AC

PaulNg

Alan,

May be I should have put my photos from Taiwan here earlier; they are all taken by a modified 350D. The coming HKAS newsletter has my Rho-Complex on the cover page. You can see the red hue of the raw file can be easily cured.

I'm attaching another photo taken in Taiwan, which is done by a mosaic of 4 images, taken by a modified 350D.


BR,
Paul Ng

ericng

原帖由 mca 於 2008-8-10 23:26 發表
Dear LT,

I see the disadvantage of modifying 300D (or 350D) . While it is good to emphasize the red color of gaseous nebula,  it also makes the SMC too red !
(The SMC is not a red galaxy !)

I am st ...

Hi Alan,

That may be due to the processing of the image. As the original balance function of the camera does not realise the front filter of CCD is changed so normally the raw images are becoming red "bias". Therefore, shoot the picture in RAW allows to render the original colour balance during post processing. Iris is a good choice but certainly Photoshop CS2 or 3 also provide the colour correction tool while open the RAW image.

In your case, if you are not using your 350D frequently for astrophotography, probably stay with the original one may be good option as once it is modified, the colour balance for normal photography is difficult to be rendered to visual realistic (still slightly deviated from normal).

The Canon 20Da is the best one I have used as it only emphasize the Ha channel so that it can be used for both normal and astro work.

Cheers,

Eric

mca

Thanks Paul & Eric for the suggestions.

This is taken with non-modified 350D + original kit lens at full aperture.



Apparently, it is not as “colorful” as the modified one. Someday I shall invest on a modified 300D or 350D.

AC