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Member Since 08 Jun 2004
Offline Last Active Oct 14 2016 04:58 PM

Posts I've Made

In Topic: My First Video with The 7D

08 October 2016 - 10:00 PM

I ended up going to a 7D MkII, solves the focus issue, but believe it or not, the focus motor makes a small noise that gets picked up by the camera's microphone, had to edit out the "noise."  The video from the 7D MkII is better because of the focus issue.



In Topic: moving to 17-40mm from 17-85, good move?

08 October 2016 - 09:57 PM

I ended up going with the Canon 17-40 L lens. I purchased a 6" dome, and have been very happy with it.  The reason I left the 17-85mm is that it had to use a +4 diopter, which eliminated any above water shots.  The only negative thing with the 17-40 is I wish it was longer than 40mm, for small targets I have to do a lot of cropping.  Now that I've used the 17-40 for a couple years, I'm going to try a Sigma 17-70mm, but it will require an 8" dome.  The lens is on order and will order the dome soon.


Reviews say the 17-70 isn't a good wide angle nor a good macro, but I think it will give me a little more reach.  I'm also thinking of a macro, 60mm or 100mm soon.



In Topic: Canon 7D MkII focus motor sounds

08 October 2016 - 08:59 PM

To answer the question, why autofocus?  I'm used to using a real video camera, a Canon GL2, until I retired it.  The only issue I've ever had with autofocus, I was on a pelagic dive off Kona, when the camera couldn't see anything in the background, it would hunt.  When I switched to the 7D, as the distance to my subject would change (beyond my control), I would have to pause the camera, re-focus, and continue, it then broke up my clips.  My Ikelite housing will not permit manual focus with the 17-40mm lens I'm using.  I then switched to the 7D MkII, which can autofocus during the shoot.  I've not had a problem with the cam hunting, it seems to make the noise periodically without changing the subject distance.  I am using the built-in microphone on the camera.  Sound isn't that important but it is neat to capture the whales talking to eachother.  I can't reach the AF/MF switch on the lens barrel, no control there.  I can't remember if through a push button setting I can turn AF off and on.  Perhaps through the "drive/af" button.  I think it's a small price to pay to get good video.  BTW, my GL2 also made a noise, you could always hear the tape drive motor running, can't have it all.



In Topic: Ikelite Buttons Sticking

08 October 2016 - 08:03 PM

Hi, this is a really great thread.  I have an extension to the question... I have the Ikelite housing for a 7D.  I cannot use the dials to change F stop or shutter speed underwater.  it appears they don't grip.  Is that something others have come across and how did you get round it?







I've had the problem, on the underside of the black camera tray, about an inch and a quarter (3cm) from the screw that holds the camera down, you should see the head of a small white nylon screw head.  If you back the screw out a turn at a time, you will notice that it will tilt the back of the camera towards the rear plate.  There are also two pins sticking up from the camera tray that have black plastic bumpers, changing the size of the bumpers will also set how far the camera goes back.  There is no need to put spacers under the camera or camera tray.


If you should decide to go from a 7D to a 7D Mk2, I have made a couple of modifications to the 7D housing to accept the new camera, this link should take you to my posts on the modifications:




BTW, every day when I finish a dive, I take my housing into the shower and hose it off with fresh water.  At the end of a dive while still in a hotel, I soak the camera equipment.  When I get home, I continue soaking the equipment to dissolve any salt.  I also lubricate the push button controls with either a tiny amount of silicon grease or silicon oil.  I have a can of dow-corning oil, can't recall where I got it.



In Topic: Canon 7D mkII - How does it performs underwater?

24 May 2016 - 11:21 AM

Hi, kind of late with this response, but I'd like to add some info.  In my situation, using an Ikelite housing, a 6" dome port and a 17-40mm Canon lens, there is no option for manual focus.  There is one gear ring, for the zoom only.  I set the camera up for only one focus point and use auto focus.  Once in a while without thinking, I might focus on the background, snap the photo and without noticing until it's too late that the main subject was slightly out of focus.


I just posted that while shooting u/w video with the MkII, I'm getting strange noises, I suspect the focus motor.  Since my 7D, previous to the MkII would not auto focus while shooting video didn't make this noise.  Right now I'm editing the noise out in post, but it would be nice if it was never there.  I'm not sure what other options there are, to turn auto focus off, but that was a feature that I wanted when I moved to the MkII.