IanF
Moderator
Okay so this one was with the car engine off and I even was able to get out of the car and plant my elbows on the car roof. As you can see it is not tack sharp. f7.1, 1/1600 shutter speed, ISO 200, 400mm. I had the camera set to continuous shooting, AI Servo, Spot metering. It is weird but there is quite a bit of noise in the image which really there should be close to none with that ISO right? BTW, this is a 100% crop. I have roughly 20 of the same image that are roughly the same or slightly different trying different f-stops ranging from f6.3-8 and they are all like this.
Tomorrow I will try the tripod test as suggested. BTW I did not know about the Depth of field preview button when I took this shot and the other today.
One thing to bear in mind is to never shoot over the roof of the car is there is any heat in the day and never over the engine compartment. In fact it's better to move away from the car altogether unless you're shooting fom inside.
Heat haze from the bodywork and from the engine compartment is guaranteed to soften photos. To the naked eye the view of the bird probably
looks okay - but not to the camera.
Personally I find the depth of preview button of very limited use even when the camera is tripod mounted - though a I dare say using an eyecup to block out the light may help and probably me wearing spectacles doesn't help either.
In the photo if you look along the length of the wire you can see the effect of depth of field. The wire a few inches to the right of the bird looks sharper.
One other ting to bear in mind with depth of field is that if the bird is the point of focus it is located 2/3 of the way into the zone of sharpness. In other words 1/3 behind is in focus and 2/3 in front - if you have a decent depth of field to play with it means you can sometimes take advantage of this when composing the photo.
I wouldn't worry too much about whether using RAW or JPEG. JPEG at it's largest size produces very good results with accurate colours. RAW does nothing to help with out of focus photos. I seldom bother with RAW files.
Noise looks acceptable - it's not overly grainy and a noise filter such as NeatImage or Picturecooler would easily take care of that.