Search results for 'back focus' - page 2470
Interesting read
Nonsense! We should have cameras with no discernible noise at the pixel level at ISO 1024000. Lenses should be so sharp, even at f/1.4 that every pixel resolves detail, on the in focus regions. They should also defy the laws of physics so that at f/22 they resolve just as much detail with no diffrac...
Posted by Tyr on 23/02/2019 - 15:25
Interesting read
It’s not the speed of the focusing that’s the problem it’s just that it can’t keep it it is always hunting Doesn't if you prefocus with the rear button before taking the shot. Any camera is likely to hunt using the half-press on the shutter release at the point of exposure. If one keeps the camera...
Posted by JAK on 26/02/2019 - 19:27
so rumours have it
Don’t think I will be going back to Pentax digital I will still keep using my lx on b/w
Posted by stu62 on 26/02/2019 - 10:53
so rumours have it
Don’t think I will be going back to Pentax digital I will still keep using my lx on b/w until Ilford raise their prices 30% like Fuji are about to do....
Posted by ilovesaabs on 26/02/2019 - 21:16
so rumours have it
We've had the same grumbles since for ever on this forum, no matter what gets introduced, but if we step back and look at what has been achieved then it's actually quite a lot. Including just about everything that we asked for. Each and every idea has no doubt generated its own bit of revenue and th...
Posted by johnriley on 27/02/2019 - 10:00
so rumours have it
I for one just want to see commitment to APS-C in the form of a camera the quality and features of the K3II which ended production a year ago, I gather. I bought mine just before this. I have no upgrade path now A year old mock up of a tarted up KP is not what I want to see trailed. So you have h...
Posted by pschlute on 28/02/2019 - 05:30
Rig for Macros
I thought some users would be interested in the macro tabletop setup I created. The focus rail is actually manufactured for precision drilling and the like. It's a PROXXON K70 Microcoordinate Table, and at $135, vastly cheaper than high end purpose built tables. It is incredibly precise, moves in bo...
Posted by hocusfocus on 09/04/2019 - 16:07
Rig for Macros
Neat solution, well done. For macro work the 2 axis stage is ideal for positioning the subject accurately but for focus stacking, I think only a single axis is needed to move the subject or camera back and forth.
Posted by Mannesty on 10/04/2019 - 07:41
Rig for Macros
For anybody interested in focus stacking macro images, I just came across this free software http://www.picolay.de/ It takes some time to produce the stacked image, especially if you need to auto-align your images. Combine-ZP is the only other free focus stacking software I've come across, there ...
Posted by Mannesty on 11/04/2019 - 17:57
Rig for Macros
You can focus stack in photoshop but I don't know how good it is.
Posted by derek897 on 11/04/2019 - 18:34
Rig for Macros
You can focus stack in Photoshop but I don't know how good it is. Affinity Photo does a better job IMHO. I have a stack of 22 images of a wasp nest and I've tried most of the available stacking software and almost all have some issues with it, Photoshop and CombineZP seem to leave OOF artifacts in v...
Posted by Mannesty on 12/04/2019 - 08:54
Rig for Macros
I have learned always to leave a large, otherwise unnecessary border around shots destined for stacking since that is the area that will suffer as the images are successively aligned. Remember that as you shoot closer and closer to the subject, (or further away, depending on how you do it), the pers...
Posted by davidwozhere on 13/04/2019 - 01:19
Rig for Macros
When I tried stacking on a wasp's nest, by moving the camera in (I think) 1 mm steps the result was awful due to the perspective shift. I don't remember details, as it was 2-3 years ago and I was using one of the free stacking programs. I have since wondered if it would be permissible to keep obj...
Posted by OldTaffy on 13/04/2019 - 15:10
Rig for Macros
I have since wondered if it would be permissible to keep object and camera fixed, and shift focus in tiny steps? That's probably how it's done in the P&S cameras that have the facility.
Posted by Mannesty on 13/04/2019 - 19:11
Rig for Macros
That's how I began doing it before I realised you could move either the subject or the camera. The main problem is estimating the increments to keep them more or less equal. A twist of the focus ring produces a lot more result than an equal twist on the screw of a rig (which usually has a handy scal...
Posted by davidwozhere on 14/04/2019 - 01:18
Rig for Macros
The later Nikon DSLR's have a 'Focus Shifting' function to produce stacks of up to 300 images, The D850, Z7, and Z6 cameras have it that I know of. It should be so easy to implement in firmware I'm a bit disappointed that Pentax hasn't done it yet, given their range of excellent macro lenses. Search...
Posted by Mannesty on 14/04/2019 - 07:01
Rig for Macros
The later Nikon DSLR's have a 'Focus Shifting' function to produce stacks of up to 300 images, The D850, Z7, and Z6 cameras have it that I know of. It should be so easy to implement in firmware I'm a bit disappointed that Pentax hasn't done it yet, given their range of excellent macro lenses. Search...
Posted by walt on 14/04/2019 - 13:11
Rig for Macros
Should also add that I've had very good success by moving the focussing ring, but only with certain lenses that feature a large and precise focus ring "range", allowing you to nudge out dozens and dozens of very small increments. Also should say David's suggestion to allow a lot of room around su...
Posted by hocusfocus on 16/04/2019 - 17:32
What's your preferred post processing software?
I use Photoshop CC for almost everything, but also Photomatix for when I feel like producing an HDR image. Photoshop gets the job done, so no need for me to be looking for an alternative. No doubt there are perfectly good alternatives, although I usually found there would be some critical tool missi...
Posted by johnriley on 10/04/2019 - 23:15
What's your preferred post processing software?
I simply can't understand the sheer complexity of these fancy toolkits - (I've got some of them) - and I go back to Faststone Image Viewer every time. Half of them, you can't understand the opening screen, never mind how to 'make it go'. I even bought the Affinity Workbook but to no avail. It must ...
Posted by davidwozhere on 13/04/2019 - 01:02
