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Topics - marekjoz

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Lenses / Stacking TC - samples
« on: March 20, 2012, 09:13:19 AM »
There are some questions regarding teleconverters - IQ achieved, AF, apperture etc. Having read great Tale of Two Teleconverters I made a test myself.

1. Controlled lighting environment
2. Tripod
3. Mirror up
4. Remote shutter
5. Several shots with different appertures, shutter speeds, liveview - best shot chosen
6. No sharpening, contrast etc.=0, DPP from RAW to JPG, Quality=10

Gear used: 7D, EF 70-200 F4 LIS (IS off), EF1.4II, EF2.0II

Below you will find the result in three sections
A. 100% crop of some area possible to make comparisons, constant width=500px
B. Almost the same area, different file sizes
C. Almost same area, JPG downsized to width=500px

Below in this post images from section A:
100% crop of some area possible to make comparisons, constant width=500px

Site Information / Karma is gone?
« on: March 17, 2012, 06:38:01 AM »
No karma on forum as for the current moment. Is it just temporary or not?

Abstract / splash
« on: March 12, 2012, 06:30:16 AM »
Water splash

Speedlites, Printers, Accessories / Selphy printers
« on: March 05, 2012, 06:23:10 PM »
Does someone here use a Selphy printer? What do you think about it? I find the quality really good although cost is rather high. Personally I'm surprised they don't have bigger formats, nor use more colors. What's the reason? Does anybody know?

EOS Bodies - For Video / If 4k video in 5dx/5d3...
« on: February 18, 2012, 03:09:17 PM »
What if really one of 5d2 successors would provide 4k video? Would you like it? Do you use 4k video in your hobby/professional work?
I'd welcome it for one reason now: possibility to crop it to 1920/1080 and thus eliminating shake blurr shaking image almost without loosing quality. What do you think about it?

Third Party Manufacturers / Best gift for a photographer [humor]
« on: February 13, 2012, 05:27:55 AM »
So continuing humorous posts (after upgrading lens to L with a tape) this is the best gift for a photographer.

Translating from Polish: "What is  best gift for a photographer? Good camera? Maybe yes but it's expensive. Today we'll show you how to make by your own an original gift, which will make for sure some fun and surprise each photography lover".

1. No, I didn't do it myself.
2. It's probably some Russian artwork (letters on a box).
3. Posted here in Third Party Manufacturers section :)

Lenses / How to increase the performance of your Canon lens [humor]
« on: February 09, 2012, 04:15:43 PM »
I found it somewhere in Internet, but haven't seen here...

EOS Bodies / OT - hasselblad masters
« on: January 13, 2012, 02:34:15 PM »
Not regarding canon, but photography strictly. For all photos lovers - there is another contest finished: Hasselblad Masters.

EOS Bodies / What if - interchengeable sensors
« on: December 20, 2011, 07:21:50 AM »
What if next 5d would have interchangeable sensors?
I don't think it's not possible from technical point of view. You can change a processor in a computer or put more memory. Some kind of transport and microadjustment would allow to avoid not proper embedding.
From marketing point of view - wouldn't you like to have a body with a choice of having ie 18MP 51200 ISO or 36MP 12800ISO?
What if they would also allow change (or add another) signal processor? 3 types of AF board?
Let's say 800$ sensor, 500$ - digic.

With some restrictions this idea wouldn't canibalize 1dx. You could for instance build a body of same capabilities but higher price summing all parts' prices than 1dx itself.

Red is going some simpler way with it's skeleton (they don't allow to change sensors but why not?)
What do you think? 

Landscape / Snow in artificial light
« on: December 15, 2011, 06:38:56 PM »
Yesterday I tried to shoot some skiing and surrounding area around 8PM, what means completely dark in this area. It supposed to be landscapes shooting in artificial lighting of lamps. Those lamps unfortunately vary a lot in colour temperature giving different tints of snow: from pink, blue to green depending on which area (which lamp's light) you point when setting the white balance. I tried to correct it but am not quite satisfied with the results.

How do you handle this in postprocessing? Below I attach some shots to give you better understanding of the problem.
Please advise best methods. Should I simply select all the snow area and make it monochrome? :)

Shot with 5D2, 24-105 L, ISO 1600/3200, F4,5-7,1, 1/5-1/30s.

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