Franz Kerschbaum

Franz Kerschbaum

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

Comments

Total: 51, showing: 1 – 20
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Here I hope for a soft copy!

Direct link | Posted on May 2, 2015 at 21:23 UTC as 130th comment
On New samples from the Sigma 24mm F1.4 DG HSM Art lens article (230 comments in total)
In reply to:

Peter Togel: O wonder how the autofocus works on this one. The 50mm Art Autofocus drives me crazy...

Have both the S35A and the S50A and use them on eos 5D2, 5D3, 7D, 450D and have no focusing problems whatsoever. The microadjustment via the USB dock worked like charm. For unfortunate customers having a bad copy I would recommend to return them or let them be checked (happend to me with my EF14/2.8II and the now gone EF50/1.4).

Direct link | Posted on Feb 26, 2015 at 15:46 UTC
In reply to:

jtan163: Carbon fibre body?
Wireless?
Hmm, well according to about 50% of the Nikon FX forum it must be an amateur model.
Pro cameras are made of magnesium alloy and wireless is just an affection for amateurs and soccer parents...
I'm just saying.

I wonder if I will be able to use my Canon LP-E6N battery. I am quite invested in these fantastic power sources and dont want to loose too much money when switching.

Direct link | Posted on Feb 25, 2015 at 11:51 UTC
In reply to:

jtan163: Carbon fibre body?
Wireless?
Hmm, well according to about 50% of the Nikon FX forum it must be an amateur model.
Pro cameras are made of magnesium alloy and wireless is just an affection for amateurs and soccer parents...
I'm just saying.

Does it have a print button?

Direct link | Posted on Feb 24, 2015 at 12:01 UTC
In reply to:

Biowizard: I wonder whether DJI will source its camera technology from Olympus? Might even be able to do away with the expensive and cumbersome external 3-axis gimble, if they employed Oly's E-Mx 5-axis IS sensor!

It makes a lot more sense to jiggle a sensor about, than to jiggle the entire camera (as at present on, for example, the Phantom Vision +).

And I would LOVE to be able to use rectilinear lenses with normal fields of view (say 35mm in full-frame terms), rather than the omnipresent fish-eye lenses of today's "action" cameras.

Brian

Dont forget the amount of correction possible (the total amplitude) in a sensor stabilisation system ist MUCH smaller than what is needed and provided by a gimbal system used on copters .. So there is nothing to save! Sorry.

Direct link | Posted on Feb 17, 2015 at 12:45 UTC
On Canon EOS 5DS / SR First Impressions Review preview (3324 comments in total)
In reply to:

justmeMN: This camera can't be any good because it (gasp!) has a mirror and (double gasp!) is made by Canon. :-)

... is there a PRINT button?

Direct link | Posted on Feb 16, 2015 at 12:08 UTC
In reply to:

Joe Ogiba: DPR: "Nikon aims for the stars with the D810A, world’s first full-frame astrophotography camera"

Really ?
"The Sony A7s is going to be the next big thing with astrophotography."
http://www.jtwastronomy.com/products/modified_sony_a7s.html

http://petapixel.com/2014/07/30/sony-a7s-astrophotography-review/

Many of us H alpha modified there Canon full frames for 300-400US$ ... Here in Austria even the Canon service center does this on request ...

Direct link | Posted on Feb 11, 2015 at 11:43 UTC
In reply to:

Edgar_in_Indy: The killer feature would be if the camera was able to use a sensor stabilization system together with GPS to track and compensate for star movement, like Pentax does with their DSLR's. But tragically, according to the terms of the Geneva Convention, Nikon and Canon are banned from offering any kind of sensor stabilization, and the derivative features, on any of their DSLR cameras.

At least I assume that's the case, since they seem dead-set on denying their loyal customers the many virtues of sensor shift capabilities. Hmmm...I wonder why that would be?

Another nice compact option when traveling! https://www.ioptron.com/index.cfm?select=productdetails&phid=6b0da2fb-2294-4805-bdcb-e534af12c1e2

Direct link | Posted on Feb 11, 2015 at 11:40 UTC
In reply to:

Esign: And where can I get a lightweight foldable travel clockwork tripod? I need some fast shots of Andromeda now.

Quite nice fro up to 135mm lenses ...
https://www.ioptron.com/index.cfm?select=productdetails&phid=6b0da2fb-2294-4805-bdcb-e534af12c1e2

Direct link | Posted on Feb 11, 2015 at 11:37 UTC
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 (571 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 29th comment
On Sigma 50mm F1.4 DG HSM | Art Lab Test Review preview (571 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 37th 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
Total: 51, showing: 1 – 20
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