Franz Kerschbaum

Franz Kerschbaum

Lives in Austria Austria
Works as a Astronomer
Joined on Apr 2, 2001

Comments

Total: 42, showing: 1 – 20
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In reply to:

sebastian huvenaars: Thanks for the link, always good to help :)

That being sayd, the amount of LED street lighting is growing fast around here (Eindhoven region). It's such an improvement! Much less orange haze in the atmosphere and everything looks lush and colorful underneath.

Its not that simple. Your "orange haze" is monochromatic ligth in the sodium d line which does not disturbe birds and insects and does not disturb astronomy since it is easy to filter out a single line. LED light is white and therefore creates several problems when not used in a good fully shielded way (full cutoff above horizontal). From the power consumption LED is much better but with the risk that one lights more than needed with these more efficient systems...

Direct link | Posted on Aug 21, 2014 at 10:49 UTC
In reply to:

Vegasus: D street light colours are amber, when change to white? city looks much better.

white creates MUCH more light pollution! amber is only in sodium d line and much les disturbing.

Direct link | Posted on Aug 21, 2014 at 10:14 UTC
In reply to:

Jan Luursema: Were did the option 'paste recipe to all images' go? DPP is unusable without it!

Its in the second drop down, number 5 counted from the bottom. First you selct all and then ...

The only drawback I see (as stated below) is that these recipes now INCLUDE cropping and rotation info which is for me a not very usefull approach since I tend to copy things like WB, noise settings, optical corrections to ALL or many pics but crop each pic differently... :(

Direct link | Posted on Jun 27, 2014 at 13:40 UTC

For me, as long time user of the classic dpp most changes are improvements and overall the performance esp. with the dlp modules. Two changes are not positive from my point of view:
- I really liked the old quick separate crop and rotation tool. It was much faster.
- Maybe connected to the loss of a separate crop and rotation tool crop and rotation is now also part of a recipe when copied from one pic to another. Meaning that if your pic contains cropping info this is copied to another pic when coping the correction recipe! Before this was separated - which was much more flexible. Normaly cropping is someting very individual for a pic and not something like a whitbalance or nois reduction setting which typically applies to a sequence of pics...

PS: ... I had one crash so far with about 1000 pics developed from my 5D3.

Direct link | Posted on Jun 21, 2014 at 07:59 UTC as 9th comment | 1 reply
On Sigma 50mm F1.4 DG HSM | Art Lab Test Review preview (557 comments in total)

I did now a short astrophotography test and I am very happy! http://www.dpreview.com/forums/post/53811756

Direct link | Posted on Jun 7, 2014 at 16:20 UTC as 20th comment
On Sigma 50mm F1.4 DG HSM | Art Lab Test Review preview (557 comments in total)

I have it now since a week and tested it a lot on my 5DIII. To make it short: my EF 50/1.2 is on ebay now. To make it a bit longer: great sharpnes and contrast already wide open (for what I want to use it). Focus quite reliable (-2MA at close distances, 0 at infinity, will be corrected via USB dock). Nice handling and it mixes nicely with my EF 85/1.2II from its color rendering... Interesting finding: dpp allows for a DLO correction! Nevertheless I do it with DXO anyway.

Direct link | Posted on Jun 2, 2014 at 10:53 UTC as 28th comment

And we in Astronomy use it for decades...

Direct link | Posted on May 9, 2014 at 07:28 UTC as 16th comment | 2 replies
On Waiting for the Night in the Domes (from outside) challenge (1 comment in total)

Ranking last is a new experience! Interesting result for this pic. Maybe nobody saw the domes?! ;)

Direct link | Posted on Sep 14, 2013 at 12:55 UTC as 1st comment
On Canon EOS 70D review gains test scene samples article (78 comments in total)

I love to see this old Austrian 20 Schilling bill in your test setup! I was using it as a kid...

Direct link | Posted on Sep 13, 2013 at 07:17 UTC as 7th comment
On Shallow depth of field photography with a story inside challenge (7 comments in total)

Should the story be explained or only evident from the pic?

Direct link | Posted on Sep 3, 2013 at 08:46 UTC as 5th comment
On Full-Frame Diagonal Fisheyes (Brand Must Match Body) challenge (13 comments in total)
In reply to:

mremonen: "•- The file entered to this challenge must be the exact same file that the camera saved to your memory card."
I shoot 100% RAW. I'm not going to post the original RAW. Will I be disqualified if I post the JPG converted in LR?

I do the same and explained the conversion in the technical details. Even full res jpg cannot be uploaded so a size reduction is mandatory anyway...

Direct link | Posted on Aug 27, 2013 at 12:22 UTC
On Planet Earth challenge (3 comments in total)
In reply to:

Skylane: I find it interesting that photo's of planet earth contain almost no humans.

And the winners focused on the heavens and not on earth...

Direct link | Posted on Aug 14, 2013 at 08:34 UTC
On Spangle challenge (5 comments in total)
In reply to:

Mike Ronesia: Definition of SPANGLE

1: a small plate of shining metal or plastic used for ornamentation especially on clothing
2: a small glittering object or particle

And all the other common uses of spangle and spangly but not flags...

Lets add this line to your definition:
3. ( intr ) to glitter or shine with or like spangles

Direct link | Posted on Aug 14, 2013 at 08:07 UTC
On Spangle challenge (5 comments in total)
In reply to:

blosshapperter: does the water spangle family Salviniaceae apply also?

Why not, only "spangled flags" are not allowed when reading the rules...

Direct link | Posted on Aug 14, 2013 at 07:59 UTC
On Mobilephone: large crowds challenge (5 comments in total)

Dear host, yes entry No. 2 (mine) was taken with a Canon EOS m but tried to follow your rules! Obviously not too many people take pictures OF crowds with their mobile phones (4-5 in the chall.) . When seeing this challenge and having recently taken my picture I thought I make this little joke to submit it with my special - but grammatically correct interpretation of the rule: "A crowd taken by mobile phones". If I wanted to cheat it would have been very easy to alter EXIF data and so on. But that was not my intention. So follow your heart.... ;)

Direct link | Posted on Aug 10, 2013 at 15:20 UTC as 1st comment | 1 reply
On Crowds of mobiles in the Mobilephone: large crowds challenge (7 comments in total)

This was a not very popular challenge; obviously not too many people take pictures OF crowds with their mobile phones. When seeing this challenge and having recently taken this picture I thought I make this little joke to submit it with my special - but grammatically correct interpretation of the rule: "A crowd taken by mobile phones". If I wanted to cheat it would have been very easy to alter EXIF data and so on. For me - and most of us these challenges with their "interesting" marking system are a relaxing hobby and not such a serious endeavor as for you. I would e.g. not invest my spare time to check EXIF data of zillions of pics to look for deviations in the meta data. So now relax, go out and take pictures of crowds WITH your mobile phones (or tablets). ;)

Direct link | Posted on Aug 10, 2013 at 15:14 UTC as 1st comment
On the moon in the The Moon challenge (1 comment in total)

"two image merged" is against the rules and quite visible ...

Direct link | Posted on Aug 8, 2013 at 08:59 UTC as 1st comment
On Full Moon in the The Moon challenge (2 comments in total)

This is photoshop work: Moon front of cloud, mirrorored reflections in the water foreground...

Direct link | Posted on Aug 8, 2013 at 08:57 UTC as 1st comment
On Crowds of mobiles in the Mobilephone: large crowds challenge (7 comments in total)

This crowd is completely taken by their mobile phones! My interpretation of the rules...

Direct link | Posted on Aug 2, 2013 at 08:44 UTC as 2nd comment | 3 replies
On Super Moon 2011 in the Super moon challenge (1 comment in total)

That is not full Moon and not Super Moon (2011, March 19)!

Direct link | Posted on Jul 17, 2013 at 13:44 UTC as 1st comment
Total: 42, showing: 1 – 20
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