Great capture just the same Paul. What focusing method were you using?
I can't remember, I'll have to try and find the original files. I think I was trying out a polarising filter for the first time, not sure if that would interfere with the sensitivity of the AF servo tracking! Having said that I was probably in panic mode and still on AF one shot mg:
Aye, AF 'One Shot' probably focused on the fish as it came towards you, so its nose was in front of the focal plane when the shutter fired. The polariser costing 2 stops of light would probably slow it down a bit as well.
Were you using a Canon SLR? Canon disable AF on all except the pro SLRs at apertures dimmer than f5.6 (or f8 just for centre point on 5DIII and 7DII). However, they need to know what the f-stop is - which they will if you fit a x1.4 or x2 TC. However, if you fit a polariser or ND filter, they don't know what you've done and continue to try and achieve AF in poor light conditions. As you'll know, when it is very dim - such as indoors - they just hunt back and forth without ever achieving AF.
However, one way to get round this is to use Live View. Use it without the real exposure simulation turned on. That way it gives you a nice bright live view on the LCD display. If you engage AF, it will do its damnedest to get AF lock for you. It won't be quick, but it's amazing what it can do if you give it a couple of seconds. I was doing a waterfall shot last week with a 10-stop ND filter on. I could hardly see a blummin' thing in the viewfinder. I switched to Live View, which gave me a great view of the scene. I moved the AF area to a nice contrasty part of the scene, pressed AF start, at which point it wobbled about a bit before giving me the green light and the confirmation beep. :thumbs:
Useful way to focus in the dark.
I was using a 7D Mk1...
Here's another good thing you can do with your 7D that comes in useful if you are in One Shot AF and you suddenly want Servo AF...
If you don't use the depth of field preview button much for showing depth of field preview, you can re-assign it to be a toggle button between One Shot and Servo AF. So, if you are in One Shot AF, press and hold the DoF button and presto, you are in Servo. If you are in Servo and you want One Shot, press and hold and you are in One Shot.
It's not brilliant on the 7D mkI, because it's on the left side as you hold the camera, so you need to change your hold with your left hand to hold it down. They realised it would be much handier on the other side, and on the 5DIII (and I'm guessing the 7DII) the button is on the right, so you can easily reach it with your right hand 3rd finger.
... although I shot it at ISO 100 there was a lot of noise in the picture, (had to do some work in photoshop)
Do you mean the sensor needs cleaning?
Lovely shots. :thumbs:
In my limited experience, I'd say that filters can often add that grainy film over the top of your images, particularly if you zoom in heavily on the RAW. I've found that even the higher end filters can do this - Hoya for example.