Search results for 'back focus' - page 2522
Penny macro contest - revisited
And here's a stack of 7 using coker's pointer and rotating protractor method for adjusting focus. Q-S1 with 30mm and reversed 35mm macro, as above. The pointer is a bit of wire attached to the knob on the 300's tripod collar. Protractor is thin cardboard, fixed by elastic band to the focus ring (tha...
Posted by Lubbyman on 18/02/2021 - 11:48
Penny macro contest - revisited
Leaps & bounds, Steve, leaps & bounds! I remember seeing the light through the wrong way as a pointer on Photomacrography site a while ago. Someone made up a small light unit that clipped onto the viewfinder slots & I was impressed with the elegance of it in use. But I'd been asleep since then ...
Posted by coker on 18/02/2021 - 17:00
Penny macro contest - revisited
Ah, I hadn't thought of shining a light through the viewfinder. Not sure it would work with a Q though...:wink: These pennies do seem to bring out the worst in highlights, don't they? You need a new, clean penny for its crisp features, then the wretched thing reflects light from lots of tiny surf...
Posted by Lubbyman on 18/02/2021 - 18:57
Penny macro contest - revisited
Quite simple... If I turn the focus ring of the 200 by say, 4 x 1/2 degrees as shown on the protractor, the focus point of the 200 with the 50 attached will be 4 x 0.05 mm. further into the subject, for that given extension (only), The more receding the subject plane, e.g.as in the side of a b...
Posted by coker on 18/02/2021 - 19:41
Penny macro contest - revisited
Latest! X10 microscope objective, full bellows extension plus a 12mm ext tube. Trial stack of six, focus via the rear standard on the bellows, of just the top surface of the letters on the 2p piece. https://www.flickr.com/photos/188519063@N07/50988966966/in/datetaken-ff/ Roger.
Posted by coker on 28/02/2021 - 13:54
Penny macro contest - revisited
Excellent. I like the 3-D effect from selective focus on the top surface of the letters. What's the working distance between microscope lens and penny? Steve
Posted by Lubbyman on 01/03/2021 - 09:35
Penny macro contest - revisited
...Fixed (somehow) to the lens... I do see what you mean. It's the "fixed somehow" that concerns me. The thought of mucking up a really nice little lens would give me sleepless nights... I had tried making a 'Polo mint' diffusing ring from polystyrene packing to fit between penny and lens, the ho...
Posted by Lubbyman on 01/03/2021 - 16:45
Penny macro contest - revisited
... said white paper disc could have 3 or 4 tabs, bent back over the body of the Q lens, then held in place with a rubber band. "SHOULD" any light get though the gap' I think we should agree to the acceptance of any blown highlights! Eh? Roger.
Posted by coker on 01/03/2021 - 19:08
Penny macro contest - revisited
Sooo... White paper disc designed, made and fitted to lens. Penny support system upgraded (i.e. no blutack now!) so lights on stalks can be properly angled. Paper and cooking foil snoot made for LED panel, to guide light into gap between penny and paper disc. Card protractor attached to DA300. K...
Posted by Lubbyman on 05/03/2021 - 22:11
Penny macro contest - revisited
You just can't stop now, Steve, can you.....?? Not until the Q-S1 has been given a fair chance to show what it can do :twisted::twisted:!! Might also try the original Q, which has an even smaller sensor. The letters on the penny do seem to be 0.5mm (top to bottom). A quick on-screen measurement...
Posted by Lubbyman on 06/03/2021 - 11:46
Weekly competition #359 Abstracts
I've left it in because it's just possible that we could have impromptu competitions in the forum section, there's no reason why not. Then we'd be back to the 800 pixels. If we look at the early competitions in the forum, by the way, we can see why the Gallery is a much better idea. I have kept m...
Posted by johnriley on 28/05/2014 - 08:36
Weekly competition #363 - Painting with Light
The subject of the competition this week is Painting with Light. The usual weekly competition rules apply. Entries must be shot using Pentax cameras, with Samsung variants of some DSLR models and Ricoh GR also included. You can look through your back catalogue for the weekly competition. ...
Posted by Blythman on 23/06/2014 - 12:48
Monthly Comp #29 - Nov 2014:
Closing Date: 30/11/2014 Judge: davidtrout Instead of setting a specific subject for November's completion I've decided to let you select some thing from your own favourite photo location. If you do landscapes it could be the area which inspires you most. If its sport then it might be a stadium,...
Posted by davidtrout on 02/11/2014 - 15:16
Weekly #408 - Cars and Trucks - Discussion
Indeed, if I don't hear anything back by early evening a new competition will be posted anyway.
Posted by johnriley on 06/05/2015 - 10:19
Weekly #408 - Cars and Trucks - Discussion
Have you checked the entries submitted so far for the monthly? One was shot on a Sony and the other (according to the image exif) back in April despite a 1 May claim though it doesn't seem to load at all now!
Posted by JAK on 06/05/2015 - 11:33
Monthly #40 Discussion
On mine, if the batteries are removed - e.g. for charging - the time and date revert straight back to the factory setting, so be careful to check when you do so. Another trick it might do is drain the batteries in a few hours and pack up altogether. This appears to be the fault of the battery termi...
Posted by davidwozhere on 24/10/2015 - 00:20
Monthly #40 Discussion
Having found out how to set it don't forget to adjust it on Sunday when the clocks go back.
Posted by Gwyn on 24/10/2015 - 09:02
Weekly Comp #434 - The Eyes Have It
We always hear about the importance of having eyes in focus - let's do it! It matters nought were the eyes those of a toy, an animal, an insect or human. Prizes to those that can focus sharply on these windows to the soul, AS WELL AS create a pleasing image with the remaining depth of field (if an...
Posted by i-Berg on 02/11/2015 - 05:59
Difficulty viewing entered portrait shots on 16:9 and 16:10 monitors...
I can't find any reference on the forum for the size of a competition image. But normally you would give the long edge of a portrait the same size as the short edge of a landscape. For example the club uses a max PDI size of 1400 x 1050 so any portrait has to be a max of 1050 high to project correct...
Posted by bforbes on 04/01/2016 - 12:54
Monthly Competition #44 - Street Furniture Competition
I'm back in contention as the only entry then :-D One image deleted, not dated February 2016. Please remember the rules for the monthly competition, shots must be new ones shot this month.
Posted by johnjbloomfield on 09/02/2016 - 12:01
