steve santikarn

fog/smog in HK can be a real problem for landscape, not an issue for your street photography though

Hi,

I have just bought a 5DMk4. I was thinking of focusing, for example, on a bird feeder and using the Canon connect app on my smart phone and live view to wait until a suitable moment to shoot. I was wondering if there were any adverse effects to keeping the mirror up for long periods of time, apart from battery drain of course. I know that with previous models it was not recommended but with modern cameras is it an issue?

the only possible downside I can think of is that the sensor may get hot after a while leading to more noise potentially. Probably not an issue in cold climate.

well, with newer models that come with built-in wifi it is a matter of writing an App to control the long exposure times from

smart phones or iPads.

thanks, that makes a lot of sense.

<p>I am just wondering if there is any good reason/s why the long Exposure time on Canon DSLR is limited to 30 seconds? Things are just getting interesting at 30 seconds for me, and of course I have cable release/timer ect. I just wonder if it is because of a technical/economic reason or lack of demands that kept this cap on long exposure time.</p>

<p>I use 6D for portraits, and astrophotography (for which it is superb)</p>

<p>I have both 7D, and 6D. I think that it is good to have the two together. The 6D strength, for me, is for low lights because it has very low noise at high ISO and the center focus point can achieve focus lock at very low light. The dynamic range and colors are also very very good (compared to the 7D).<br>

For birds and wildlife, sports and kids running around I still get better results with the 7D. I got rather poor result (not in focus) for bird-in-flight shots with the 6D for example.<br>

So they complement each other rather than one replacing the other, in my opinion. I plan to keep both (partly because I have a few EF-S lenses, which may come in handy if the 7D II turns out to be good). Too bad the 6D and 7D do not use same size batteries.</p>

I have both the 6D, and the 7D and I take lightning photos on the regular basis. I would say that the 6D is the better

choise for its better dynamic range and lower noise on long exposures. I dont make use of high frame rate but for daylight

lightning shots I find that if you lock mirror up, and use manual focus you have enough time to react to lightning.

thanks for all the advice, it looks like I wont be able to go like a Porsche in a VW...

<p>Thanks for the comments and suggestions. I can try using optical slave with my existing G12 set up (infinitely cheaper than trying to get the housing for the 7D).<br>

I have limited success with Canon G12 in UW housing, one of the problem is the on camera flash highlighting all the debris in the water in front of the camera, so I was thinking that off camera flash might do the trick. I posted my photos from the Maldives in my Photonet workspace, you can see what it looks like in relatively shallow water.</p>

 

I am contemplating underwater photography with external flash. I wonder if I use the 7D in UW housing would it be possible to use on

camera flash to wirelessly trigger a Canon EX580 as slave flash? Has it been done?

been to many dusty places, with normal care my 100-400 mm is still as performing as well as new

<p>I completely agree with Robin</p>

<p>I would rather travel with the mk2 for the self sensor cleaner alone (nothing more annoying than to find a dust spot on your photos after the trip). But you'll need more storage space for your larger files.</p>

<p>Canon 70-200 is an excellent all-round lens choice, also good range for portrait lens. The f/2.8 version has beautiful bokeh.</p>

<p>keep the 5DII,and the 100 mm for macro work. Buy a stabilized third party 70-200 f2.8 lens that is black. Then you'll have an unobtrusive portrait lens that you need.</p>

pretty much evenly split between the FOR and AGAINST camps I would say. I must say that when I got the 40D I

thought that I would not need any more resolution, but now that I have been using the 7D for a while I find it hard to

go back to using the 40D.

<p>just when I thought the megapixel race is over rumours are that the new 5D mkIII will have 32 megapixels. My question is this: Doees anyone want more resolution for the 5D's series?</p>

<p>I have been looking for the collar for my L 100 IS Macro for ages, no one seem to have any. I say go for it. The two piece Canon collar for the old 100 mm macro lens was a real pain in the neck, I can't imagine anything can be worse than that.</p>

<p>a reasonably priced 150-450 mm L IS f/4-5.6 push-pull zoom lens</p>

<p>the ability to fold up the lcd screen certainly helps to protect the screen. Most susceptible part is probably the built-in "lens cap".</p>

<p>if you have ef-s lens then go for the 7D. I have 7D and a 40D as a back up, the 40D has almost never been used since I got the 7D.</p>

It won't be cheap, look at the price of Nikon 200-400 f4 lens, and add the price of an extender.

<p>I have taken this lens to some extrememly dusty. damp, wet ect places over 5 years with no ill effects.</p>

<p>Just take the Canon 7D and the Canon 15-85 mm IS lens and nothing else for ultimate light weight travel. Not the widest (you can photostitch if you need wider) and not the longest (but with 7D you have quite a bit of digital zoomability) but will cover you for 90% of your photography needs in one relatively compact and light package.</p>