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Topics - Marsu42

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EOS Bodies / 6D: LCD protector w/o air bubbles?
« on: September 29, 2013, 04:12:53 PM »
Canon didn't grace the 6d with the swivel screen of the 60d (turn to protect) or a glass lcd like the 5d3, so I'd like to invest the money Canon saved in a 3rd party glass protector...

... Problem is: As a result of the natural and smooth, round 6D finish (edit: Amazon reviews state that) the screen is not planar but slightly bent, esp. on the top right. I currently have a thin plastic lcd cover, and it does show air bubbles in this region.

Did anybody manage to find a glass or comparably sturdy 6D lcd protection that applies *without* air bubbles beneath?

Esp. anything *glued* to the screen seems to have this problem (see attached image with black glue border), what *might* work is a much more expensive glass cover that only electrostatically attaches (image with "hama" brand). Any experiences?

Technical Support / 5d3/6d silent shutter: faster, slower or equal wear?
« on: September 25, 2013, 04:07:45 PM »
If shutter lag time isn't an issue: Does shooting in silent shutter mode protect the camera since it's moving the mirror slower(?), i.e. putting less physical stress on the components? Or is the max. shutter rating due to the curtains failing, meaning silent or normal shutter doesn't matter? Thanks!

I'd like to get a "as cheap as possible" android phone for 6d remote control and would like to ask for advice here. I've never gotten a smartphone before, I don't really need any smartphone capabilities, it's really just for this one purpose and voice telephony.

Are there any experiences with different phone types that don't really work with eos remote, what are you using?

Edit: It seems a tablet would be really better suited for me, so I extended the topic to match this change.

EOS Bodies - For Stills / How does read noise actually affect image quality?
« on: September 20, 2013, 05:31:44 PM »
Since somehow every sensor thread seems to degrade quickly into gibberish and brand fanboyism, I'm a bit embarrassed to admit that I still don't get how the real world impact of a camera's read noise is.

My current understanding: traditional non-Exmor sensor designs have higher read noise at low iso which also affects max. dynamic range (but this thread isn't about dr). Also read noise doesn't equal banding artifacts, see the lower 7d figures - but this model has higher banding due to the dual readout channels. says: @iso 100 / 200 / 400 / 800:
7d: 8.4 / 4.7 / 3.3 / 2.8
60d: 13.2 / 8.4 / 4.4 / 3.2
5d3: 33.1 / 18.2 / 10.6 / 6.1
6d: 26.8 / 14.6 / 7.9 / 5.1

Question: Except for long time astronomy exposures, when (if at all) does this mean that shooting at higher iso might/will give better iq than at the lowest iso setting? Thanks for explaining!

Lenses / What (nd) filter to put in the 17-40L back filter holder?
« on: September 20, 2013, 05:01:53 AM »
I recently realized my 17-40L has this back filter holder :-p and I now even have though of a use for it: With my 10x glass screw-in nd filter I don't get long enough shutter times for cloud blur in bright daylight, so I'd like to add another gel nd filter.

Question: What nd gels do I get to put behind the 17-40L?

Lenses / Effective iq for same dof on ff vs. crop @ same shutter speed?
« on: September 19, 2013, 06:03:33 PM »
This is a thought experiment I've been wondering about, I hope I understand the basics correctly :-p ...

Let's say I want to have a certain depth of field and use a full frame and a crop camera with the same shutter speed. When going from crop to ff, I'd need to close the aperture to get the same dof for the same field of view. At the same time, I could raise the iso to counter this light loss with the ff and to remain at the same shutter speed.

Question: Which iq (noise, ...) is better: crop with lower iso or ff with higher iso? When shooting handheld with a macro lens at macro distance, maybe shooting with a crop is even better than ff if a large dof is wanted?

Technical Support / How to fix a physically broken sd card?
« on: September 19, 2013, 04:02:02 PM »
After 3 years of pulling it out of the camera and putting it into my laptop, my trusty ol' 32gb sandisk finally broke - the front part with the pins fell out because the plastic sandwich construction came loose.

However, I only then realized that the front part *is* the actual sd card, there's nothing but empty plastic in the back part - if I tape the thing together again, it works in my laptop, but won't fit into the camera.

Question: Is there any way to get hold of a replacement sd "chip" holder so I can continue using the front part that obviously works perfectly fine? If I'd bought a micro-sdhc with sd adapter the solution would be simpler...

Lenses / AF hit ratio with 100L and portraits?
« on: September 18, 2013, 02:51:15 PM »
I was recently practicing portrait photography with my old 60d and the 100L, usually set to f2.8. Unfortunately, I find the af misses a lot, much more than in macro photography - am I doing something wrong?

I was using focus & recompose on the eye due to the lack of af points on the 60d, and in good light the lens missed about 1/3rd (some near misses, some real out of focus), and in bad light the af hit ratio was a sheer catastrophe but that's simply because the 60d doesn't af in dim light. I wonder:

* Is my technique wrong? The 100L has a very slow af as a macro lens, but is 1/3rd misses in focus & recompose with aperture wide open what I should expect... I waited for the af confirm after all? For macro, I nearly never shoot wide open.

* Is my camera af broken or maybe dirty? I recently also find my 70-300L @f4 missing somewhat more often than I remember. Btw I never tested the lenses for afma since my 60d hasn't got it anyway.

Edit: I could add some sample pictures if that helps, I didn't throw the bad ones away yet.

Lighting / Please explain how multi-group ettl preflash works?
« on: September 14, 2013, 03:37:48 PM »
I know what ettl2 is and what the preflash does in general, what I'd like to understand is how multiple groups work.

* Is it that every group does successive pre-flashes on their own so that the camera can determine what ettl ambient/flash ratio to set?

* Is this also the reason why pre-2012 don't work in group mode as they are only able to meter two pre-flashes (a:b and c) and rt requires up to five (a-e)? However, even if so Canon could at least have made it possible to use groups a+b in ettl and d-e in m flash mode (not to bash Canon, just for my understanding of the system)?

I'm wondering: What's the use of the new wifi remote control in practice, given that you cannot move the camera/lens itself? And with the upcoming 70d you can just the swivel screen for awkward angles...

... Is the wifi app just an enhanced self portrait gadget or has anybody managed to pull off some shots that wouldn't have been possible otherwise, for example shy wildlife? None of the Canon marketing examples really convince me :-\ but I'd be not surprised if there were creative uses I currently cannot think of.

Btw one of the shortcomings seems to me that as usual there is no sdk, so we cannot expect 3rd parties like Magic Lantern to make use of this feature for focus stacking, timelapse, motion detection, trap focus ... and the Canon apps seems to be limited to p&s.

EOS Bodies / Play Arkanoid on your Canon dslr :-)
« on: August 15, 2013, 07:47:16 AM »
Fyi hot newsflash: Magic Lantern has not only the Sokoban puzzle, but the most recent module lets you play ARKANOID on your dslr - take that, Nikon DR junkies :-> ... it should be included in the latest nightly builds. Go, Magic Lantern, go!

Lighting / Is ETTL2 metering the same on all Canon models?
« on: August 09, 2013, 12:18:06 PM »
Question to long-time Canon shooters with access to different models:

Since my 60d sometimes shows strange behavior in ettl mode (like +-1/3 ec has way more impact than half of +-2/3) I'm wondering if Canon is constantly revising the algorithm and what / how noticeable the differences are, for example on Canon's latest systems like the 6d.


Lighting / Which gel holder for the 600ex-rt - original or 3rd party?
« on: July 30, 2013, 10:01:27 PM »
I'd like to buy effect and color correction gels for my 600ex-rt flashes, and there are decent offers from the UK cut for the original Canon gel holder - see

However, I'm not so sure if the Canon gel holder is really the way to go, and the flash afaik won't recognize 3rd party gels anyway so there's no need for large gels that cover the sensor... Questions:

* Do you use the Canon gel holder with the 600ex-rt or did you buy other holders (which) that take other/smaller gels (which?)?

* Do you use a plastic gel holder at all or simply velcro-strap the gels to the flash (with the added advantage that this method works on all other flash types, too)?


Lighting / Which coldshoe for 600ex-rt type (sealed hotshoe) flashes?
« on: July 30, 2013, 09:06:31 PM »
I'm very good at loosing small plastic parts, so I'd like to stock up on some coldshoes for my flashes. I've already tried to order one version, but it doesn't really fit because the rubber part on the hotshoe gets crammed inside the coldshoe, there is no lock and the flash tends to fall off (picture of this version attached, it's the black gadget). Before I waste money on other overpriced plastic pieces:

* Did you find any type of 3rd party coldshoe for putting on the ground that is equivalent to what Canon delivers (no, thanks, I'm not buying an original Canon part for this :-p)?

* I also need a foolproof coldshoe just to attach the flash to a bracket or tripod, something like the blue thing in the attached picture, but I'd be ok if it was cheaper than this patented version...

Thanks for any help, I cannot predict how these ebay offers really fit and I'm not willing to pay €20 in a local camera store for e 2 ct plastic piece, call it principle if you like :-o

With the 6d imho being designed to be cheap in production, I'm wondering how far the price will drop further, esp. with the 70d also targeting an "amateur/enthusiast" crowd but with different needs.

So, in the grand old tradition of my price polls, vote and be able to say "I told you so" :-) ... and the prices are for the U.S., in Europe the 6d sells for a *lot* more which imho will also change sooner or later.

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