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Looks great Pete. Just curious, have you done the latest firmware update on the camera?
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That looks pretty good Pete.
I recently found how to get CAF working for me (having more or less given up on it after reading so many negative comments on its effectiveness) and wrote a short blog on it. The key factors controlling how well it worked for me are summarised here:
Quote: I was able to track the action with no problem and found that I was getting less than 10% lost focus shots (mind you, if I hadn't acquired focus lock to start with that became 100%)
What was different from my earlier attempts? well:
- the subjects tended to fill greater than 10% of the frame (typically 15-30%)
- the light was excellent with strong contrast and colour
- its a subject I know well so I was able to anticipate when the critical action was about to start and was then able to give the CAF time to lock properly before I began shooting a sequence
It would be interesting to see how others are getting on with this function
I say did quite well...it was the best of six attempts, so might not be trustworthy enough for a single important once only pass, but certainly better than I expected for the fast moving dog.
Quote: what lens was being used.
Quote: have you done the latest firmware update on the camera
I hadn't checked for ages. I was on v1.2 and have just updated to 1.4 and then to 1.5 and discovered that horrible sound of whirring has been reduced
Quote: The key factors controlling how well it worked for me are summarised here:
Those points tick the same boxes here
I've just splashed out and got myself a Tamron 500 SP BB mirror lens to play with and it turned up about about an hour ago.
Its like me, a bit old and tired but still has its box and filters and appears reasonably clean inside (so sign of fungus or oily splodges )
Its a fraction of the weight of the Sigma 400 that its to replace and a quick trial in not terribly good light shows that hand-holding is possible, although I suspect it will be mostly used of the 'pod)
Here's a quick focus test on my trusty local Pylon at about 400yds distance + a 100% crop from the centre
Shot with ISO 400 and 1/250th sec and IS/1 activated on half-press to stop me getting seasick looking through the view-finder
I'm looking forward to a bit of "Birding" in good light
Given the reputation of mirror lenses that is excellent quality! have you applied any aberration correction?
Thanks Mike, nope, no corrections, but I read that mirror lenses have very little aberration but an lot of doughnuts in the background.
I must say that with the few shots I've tried so far it doesn't look anything like some of the shots I've seen put up saying how bad they can be (but there's time yet )
Some years ago I tried a sigma 600 mirror on my 7D and it was atrocious, soft, smeary and it went back pronto but this one looks like a "Keeper"
Here's another of my "Focus test target" shots, this one at about 100 yds distance and it still seems to be holding up quite well, hand-held with ISO800
Its pretty close to what I was getting from the best shots with the old Sigma 400 on the EM-5, maybe a little sharper.
So far, so good
Quote: I must say that with the few shots I've tried so far it doesn't look anything like some of the shots I've seen put up saying how bad they can be
Cheap ones such as the Centon are dreadful, but the Tamron is a star performer. I've been using one for years
I had spotted that Pete (and was going to blame you if I got a dud! )
Any tips on how to get the best from it on the EM-5 would be welcome
I have mine on a PK lens mount and PK to Micro 4/3 adaptor. I then use the 14x magnification and a sturdy tripod is needed so you can focus accurately. I really like those doughnut oof highlights so I tend to set the focus so those are behind the subject at the right out of focus size and position the subject I want in focus in front at the optimum distance.
I did a video piece for ePHOTOzine.tv a few years ago shooting bluebells. Skip to 7:30 for my bit
Lol just been looking for that video and gave up, good job you knew were to find it Pete
I`ve been having a play with my vivitar series 1 200mm f3 on the OMD, its very nice with the IS
The only other bit of kit I want at the moment is the body cap lens,
Hm...I've still got my old Minolta AF 500mm reflex lurking in the back of the cupboard. I didn't use it much back in my Minolta days, but when I did the result were good. Perhaps there's a use for it yet.
I had a quick and very cold trip to Mudeford Quay this morning to try out the Tammy 500 on proper subjects, mainly birds in flight and standing still
My technique needs a lot more work, its amazing how much more difficult hand-holding a 500mm lens (eq FOV = 1000mm) compared to a 300mm (eq FOV = 600mm). Just getting and keeping the subject in the frame is hard enough, add to that the incredibly sensitive focus ring movement and I think I have the excuse as to why my keeper rate was only around 1%!
Mind you, I was pleased with the keepers, not up to canon 500mm f4L level but not too bad I reckon (what do you think?)
I've now gone through the bulk of my shots from this morning, this is definitely one of those "the more I use it the better it gets" lenses, by the end of the session my "keeper" rate was creeping up to 10%
I'm going to enjoy exploring just what is possible with this tool
Darn good for manual focus and handholding Brian. I would limit myself to 200mm FF (400 on the E-M5) for BIF.
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1st March 2014 - 31st March 2014
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