Light is Everything!

Posts tagged “AF Fine tune

She’s a Keeper!

Finally got my new 50mm f/1.4G lens. It was on back order but I got word that it arrived at Donna’s Den yesterday. So, I loaded up the kids and went down to the Den to pick it up. And, to top it all off, I had NO border hassle, either going or coming back. Because I already paid tax on the lens, they didn’t make me go through the hassle of filling out 18 thousand metric tonnes of paper work to get my $25 bucks back. πŸ™‚

Being gun shy from the last lens that was defective, I brought this one home and immediately did my pop-can sharpness test again. f/5.6 is the sharpest usable aperture for this lens, so I dialled it in and viola! It’s sharp!

Tack Sharp!

And, just to be safe, I did my Auto Focus test again too. But when I did it, it seemed like this new lens was front focusing (whereas the other lens was back-focused into the next county)! CURSES!!! I thought, surely this can’t be?! What are the odds?! All those Canon people aren’t crazy after all! πŸ˜‰ . . . But, silly me, I forgot to de-activate the AF Fine Tune settings from the last time I was trying to calibrate the defective lens. Once I turned that compensation off, the Auto Focus was bang on even at f/1.4! πŸ™‚

And, to top it all off, I did a crazy self portrait with ridiculous settings. Why not? The new lens is a keeper! πŸ˜€ Soooo stoked!

ISO 3200 f/1.4 1/30 50mm


Oh, my aching back-focus!

CRAP! 😦 My 50mm f/1.4G just arrived from B&H and I have to ship it back. Β As soon as I opened it I started doing some focus testing with it and realized it was back focusing. Essentially, when you put your focus point on the subject, the focus point wasn’t in focus. The stuff a couple inches from your focus point was in focus. Which is completely unacceptable to me. I called B&H and they sent me a RMA thing but I have to go to Bowbells to ship it. Bummer!!!

Anyways, its fodder for a blog post. πŸ˜‰

My D300s gives adjustment for fine tuning lenses in the menu system which is really nice. You can correct the focus somewhat and compensate for a lens that isn’t quite bang on. Then it saves the information and any time you attach that lens, the camera uses the information to correct the focus which is super handy. But testing for focus problems can be a bit of a bummer. Fortunately there is YouTube to the rescue. Consult these helpful vids if you expect you are experiencing back focusing or front focusing.

Back Focusing Sample Shots:

So there you go. Hopefully it won’t take 4 years to get a replacement and when it comes there will be no issues. Curses! Oh well. It builds character. πŸ˜‰

Shot at f/4 - focus is completely off. The whole face should be sharp at f/4