Search results for 'back focus' - page 1747
Lens calibration - Focus Tune software
I don't trust my eyes :)
Posted by McBrian on 29/04/2013 - 10:40
Lens calibration - Focus Tune software
I didn't know there was a word search puzzle on the back of Cornflakes boxes :shock: I'll have to change from Bran flakes, anything to help get better photos :D
Posted by tyronet2000 on 29/04/2013 - 10:41
Lens calibration - Focus Tune software
Is the software camera specific? No, but some Canon and Nikon cameras output their adjustment settings, Pentax doesn't, which means you can only use the shot by shot comparison analysis method. Hi Peter When you say "Pentax doesn't" do you mean that the adjustment setting 0, +2, -2 etc. didn't s...
Posted by McBrian on 29/04/2013 - 10:50
Lens calibration - Focus Tune software
My understanding is the the micro adjustment does indeed move the sensor back and forth relative to the lens mount flange on a per lens basis (or global) depending on your choice from the lens adjustment menu. Your understanding is wrong.
Posted by kh1234567890 on 29/04/2013 - 10:51
Lens calibration - Focus Tune software
Care to explain? Its such a blunt comment.
Posted by gartmore on 29/04/2013 - 11:02
Lens calibration - Focus Tune software
When you say "Pentax doesn't" do you mean that the adjustment setting 0, +2, -2 etc. didn't shown in the software? I'm pretty sure different cameras makes use different scales. I doubt there is any standard unit applied to these values so would be very surprised if, say, a Canon +2 setting equals...
Posted by JAK on 29/04/2013 - 11:38
Lens calibration - Focus Tune software
The AF sensor is bolted to the base of the camera body. Nothing short of baseplate removal and mechanical adjustment is going to move it...
Posted by dpm on 29/04/2013 - 11:46
Lens calibration - Focus Tune software
The AF sensor is bolted to the base of the camera body. Nothing short of baseplate removal and mechanical adjustment is going to move it... Nope, the sensor plate (oscillator plate) is not bolted to anything, it is held in position between the the front plate (permanent magnets) and the back plate b...
Posted by McBrian on 29/04/2013 - 12:59
Lens calibration - Focus Tune software
When you say "Pentax doesn't" do you mean that the adjustment setting 0, +2, -2 etc. didn't shown in the software? I'm pretty sure different cameras makes use different scales. I doubt there is any standard unit applied to these values so would be very surprised if, say, a Canon +2 setting equals...
Posted by McBrian on 29/04/2013 - 13:06
Lens calibration - Focus Tune software
A scale is a scale whether it is +20 to -20 or +10 to -10 and yes the software does recognize the pentax scale of +10 to -10. The software actual measures the sharpness of each image in the set and reports what it believes to be 1: the sharpest image 2: the best average setting based on the image se...
Posted by JAK on 29/04/2013 - 13:36
Lens calibration - Focus Tune software
Now apparently, according to this thread, I have to go into a high tech lab with specific software just to setup the camera before I even press the shutter. That is not what this thread is saying at all, so it's a somewhat spurious argument really. You speak of two quite different things, the exposu...
Posted by johnriley on 29/04/2013 - 14:11
Lens calibration - Focus Tune software
Come, come. One isn't going to kill the camera by making a slight AF adjustment for one lens. It's hardly dangerous messing, there to help misfocus issues when they arise and can be reset in an instant. Calling it dangerous messing is itself a bold statement. The comments here about this software...
Posted by JAK on 29/04/2013 - 14:26
Lens calibration - Focus Tune software
JAK, dangerous in the sense that the end user becomes capable of rendering all his or her lenses out of collimation. Obviously they can be put back as easily, they are not going to explode. Dangerous in the sense of "a little knowledge is dangerous". Would I recommend the software? My opinion is ...
Posted by johnriley on 29/04/2013 - 14:34
Lens calibration - Focus Tune software
There are several reviews on the web and a respected forum discussion here with some who have tried it: http://www.luminous-landscape.com/forum/index.php?topic=71660.0 The thread concludes, "I also use a 100mm macro, most often for macro shots, but sometimes as a mild telephoto. I suppose se...
Posted by JAK on 29/04/2013 - 14:46
Lens calibration - Focus Tune software
It does in one sense JAK, but probably not quite how you mean it. We need to be more logical in approach here. That is a thread on a forum, no more or less repsected that anything else because it's the observations of individuals. It is not a scientific approach to try a product, as one writer d...
Posted by johnriley on 29/04/2013 - 15:11
Lens calibration - Focus Tune software
Yes I agree this time! In my own case I have determined that the 100mm macro used close up is likely to be out and need a +4 adjustment. I can quickly apply that if needed. How the lens performs at infinity I have no idea, it may even front focus and need a negative adjustment, I don't know. The ...
Posted by JAK on 29/04/2013 - 15:28
Lens calibration - Focus Tune software
The AF sensor is bolted to the base of the camera body. Nothing short of baseplate removal and mechanical adjustment is going to move it... Nope, the sensor plate (oscillator plate) is not bolted to anything, it is held in position between the the front plate (permanent magnets) and the back plate b...
Posted by dpm on 29/04/2013 - 16:07
Lens calibration - Focus Tune software
JAK, dangerous in the sense that the end user becomes capable of rendering all his or her lenses out of collimation. Obviously they can be put back as easily, they are not going to explode. Dangerous in the sense of "a little knowledge is dangerous". "Dangerous" ??? This is a simple AF adjustmen...
Posted by Smeggypants on 29/04/2013 - 16:52
Lens calibration - Focus Tune software
You clearly won't be buying it then Mr S....:)
Posted by johnriley on 29/04/2013 - 16:55
Lens calibration - Focus Tune software
If you don't take a thoughtful and precise approach to the procedure the results may well be worse than not bothering at all. The results wont be worse. You set the AF parameter value so there is no front or back focussing. This value could be zero or anything else between -10 and +10
Posted by Smeggypants on 29/04/2013 - 16:55
