Search results for 'back focus' - page 2521
Penny macro contest - revisited
I think I used a K7 mounted on one of those "photomate" things and 50mm lens and extension tubes with the subject on an outside work bench in good light. Did get a M42 Pentax bellows but couldn't get the lens on it so sent them back :(
Posted by tyronet2000 on 29/03/2014 - 20:22
Penny macro contest - revisited
K5, 68mm extension tubes, Vivitar 135mm CF (with fungus), Marumi +10 Apochromatic Dioptre, Sigma EF500 Super, cheap cable, cheaper diffuser, plenty of bananas and buttons. Remote mirror lock up, Rawtherapee, resize in Picasa. I want one of those macro focus jobbies. It was nigh on impossib...
Posted by dougf8 on 29/03/2014 - 21:51
Penny macro contest - revisited
Had a quick go at this but the light was no good so tried to light it with the light on my phone Any way from camera moving forward I have K30/KENKO 1.5X/KENKO 2.0X CONVERTERS/3X SETS EXTENSION TUBES/PENTAX A50mm F1.7@F16 10s exposure 12 sec delay to try and counter the wobble! Live view focus peak...
Posted by geordie01 on 30/03/2014 - 17:59
Penny macro contest - revisited
Here's exactly the same combo as above (both on the K5iis BTW), but this time with lovely diffused daylight from the window, and a 3 second exposure instead of harsh flash with distracting specular highlights. Good to be reminded - lighting is everything. Oh... back to the original angle too, whic...
Posted by Darkmunk on 05/04/2014 - 09:53
Penny macro contest - revisited
Not very nice outside this afternoon, so here's my go at it! K5. Pentax Auto Bellows M, 150mm ext. Kenko P/AF 2x tele converter MC7. Extension tubes, 65mm. 100mm D FA Macro (Sorry....:?) Focused in live view, using the focus stage of the bellows set. Unable to stop ...
Posted by coker on 06/04/2014 - 16:07
Penny macro contest - revisited
Oh dear Mark, what have you (re)started?? I may just have to see what I can do... :wink: Might have to get my bellows back off NeilP! :twisted: Hmmm, just been having a quick play, and have been looking at an image width of 4 pixels on my monitor. As in, pointing the camera/lenses combo at m...
Posted by Daniel Bridge on 09/04/2014 - 01:01
Penny macro contest - revisited
2nd attempt, done quickly, as you get closer it gets more difficult with focus and stopping the whole shebang waggling about, especially on the wooden floor, I'll do it on something solid next time. Might be lucky with a wider angle lens on ebay if the bids come off. Cost of lens assembly roughly ...
Posted by dougf8 on 14/04/2014 - 21:10
Penny macro contest - revisited
Steve,how about giving it the full PP works & see how it comes up? Depends on progress with domestic duties... :( I'm going to have another go in a few days time, trying to focus as accurately as possible and with a less well rubbed penny! These were done using the camera screen but will try the ...
Posted by Lubbyman on 13/02/2021 - 14:06
Penny macro contest - revisited
Another way around the focusing is mount the target on a separate focus slider on a tripod, line it up carefully with the camera-lens ensemble and then use the focus slider's screw to move the target. It's a lot lighter than the camera and stuff (which could move disastrously with the slightest nud...
Posted by davidwozhere on 14/02/2021 - 00:08
Penny macro contest - revisited
Another way around the focusing is mount the target on a separate focus slider on a tripod, line it up carefully with the camera-lens ensemble and then use the focus slider's screw to move the target. It's a lot lighter than the camera and stuff (which could move disastrously with the slightest nud...
Posted by Lubbyman on 14/02/2021 - 16:01
Penny macro contest - revisited
My attempt using the K70. Not really tried anything like this before but enjoyed the challenge. Used a Helicoid extension, M135 lens with a reversed M28mm lens. Using the helicoid made focussing easier, I had tried using bellows but very difficult to focus without a focussing rail.
Posted by PRYorkshire on 14/02/2021 - 16:55
Penny macro contest - revisited
I made some space for a lot of kit this afternoon. Two tripods - one for the coin Blutacked onto the end of a BPM focus slider and one for the camera and it's accoutrements. Attached to the K5 was a BPM bellows half extended sitting on top of a heavy cast iron Pentax focus slider (hefty great thing...
Posted by davidwozhere on 15/02/2021 - 01:53
Penny macro contest - revisited
Well. I thought I was losing it to be honest! Got it all set up last evening, popped-off a frame or two.... RUBBISH! Cut a long srtory short, this morning re-checked every thing. Thought I had over-reached myself,TBH. Questioned in my mind everything,. Then it dawned. I'd been usin...
Posted by coker on 15/02/2021 - 15:32
Penny macro contest - revisited
Don't know the diff between each shot, since that'not how I shoot it...... See images 1 & 2, showing the arc of degrees which is concentric with the 200mm f4 lens on which it is held, with a rubber band around the focus ring. Its position on the circumference of the ring is adjustable to suit the p...
Posted by coker on 15/02/2021 - 22:57
Penny macro contest - revisited
See if I've got this right. I follow the way you discover the total focus distance and divvy it up according the the number of shots you will use but you are dealing with (a) a linear focusing method and (b) a rotary one. The pointer is fixed to something mounted on the linear method yet the scale i...
Posted by davidwozhere on 16/02/2021 - 00:37
Penny macro contest - revisited
O.K., David. I'm using the 200 f4 to focus. It was a case of finding a way to move/focus the assembly/lens by very small increments, smaller than is possible with the (rotary) focus ring alone or using the linear focus rail. The protractor is fixed to the focus ring of the lens. The pointer i...
Posted by coker on 16/02/2021 - 08:40
Penny macro contest - revisited
Aha, I now understand how you're getting the fine control. A brilliant bit of creative improvisation. :D Does the fine focus work because the 200 f4 is changing its point of focus or because the attached reversed lens moves back/forwards as the focus ring of the 200 f4 is rotated? Or to put it ...
Posted by Lubbyman on 16/02/2021 - 09:39
Penny macro contest - revisited
Thanks, Steve. I think for these purposes, the reversed lens' role is a passive one, but just as a carrier for the iris to stop down with. I would have thought that, as long as the lens has a manual focus ring for the protractor to sit on, focal length is irrelevant. You're simply focusing the "...
Posted by coker on 16/02/2021 - 14:15
Penny macro contest - revisited
Just printed and cut out a protractor, fitted it on the nice, big focus ring of the DA300, found some fine wire and a way of holding it in place... Now need the kitchen to be clear of people and cooking. Perhaps have a go this evening when the haze has cleared after pancakes have been cooked and eat...
Posted by Lubbyman on 16/02/2021 - 15:03
Penny macro contest - revisited
OK, here we go... All with DA*300mm + reversed DA35mm f2.8 macro. JPG straight from camera. This set uses linear focus. Steps of about 1/12mm. One step is enough to take focus from surface of letters to surface of coin, so the letters must be about 0.1mm thick. 1. K3 2. K3 + 1.4TC ...
Posted by Lubbyman on 17/02/2021 - 21:35
