Search found 71 matches

by hero
Sun Mar 03, 2019 2:01 pm
Forum: Macro and Micro Technique and Technical Discussions
Topic: Three very minor Zerene UI suggestions
Replies: 12
Views: 3939

While we're on UI suggestions, one idea I would like to propose is to have an option to put a small crosshair at the center of the circle for the retouching tool. This would help to locate the pointer's position when the circle is set to a fairly large radius.
by hero
Tue Jan 29, 2019 12:19 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: Update - looking for more suggestions
Replies: 16
Views: 7361

Apparently, the meaning of my post has become twisted in a way that was not my original intent. I did not, for example, say "consumer level." I used the word "consumer" to refer to lenses that are available for the general photographer, with a native system mount, as opposed to, for example, a micro...
by hero
Sun Jan 27, 2019 12:26 pm
Forum: Macro and Micro Technique and Technical Discussions
Topic: Update - looking for more suggestions
Replies: 16
Views: 7361

None of the consumer 100mm 1:1 macro lenses do that well (compared to simpler designs or microscope objectives) using extension to bring them up to 2:1, because the amount of extension needed is substantial. I've personally pushed the Canon EF 100/2.8L macro IS with tubes plus a teleconverter to get...
by hero
Fri Jan 18, 2019 1:02 pm
Forum: Equipment Discussions
Topic: Tripod for remote outdoor macro?
Replies: 15
Views: 5242

In my experience, tripods tend to get in the way when doing field macro work. Subjects tend to move about in the field, and it is very cumbersome and time-consuming to set up the shot just right, only to discover that the subject has moved some tiny amount that has negated your adjustments. If stabi...
by hero
Thu Jan 17, 2019 1:02 pm
Forum: Equipment Discussions
Topic: New lens company and APO macro lens
Replies: 7
Views: 3033

When I saw the PSF plot, I laughed. Any plot would look good if you choose the scaling of the axes that way. In all honesty, there is no shortage of excellent options for 1:infinity - 1:1 or even 2:1 magnification in this focal length range. I don't see how this lens brings more to the table. Now, i...
by hero
Tue Jan 15, 2019 10:38 am
Forum: Equipment Discussions
Topic: Which camera bodies have fully electronic shutter?
Replies: 39
Views: 10936

Agree with Rik here. Note that when you're using a physical shutter to expose the image, there's a sync speed, usually like 1/200 s, above which one must use a high-speed sync mode for the strobe or else the flash will not illuminate the entire sensor due to the fact that there is no moment in time ...
by hero
Fri Jan 04, 2019 6:39 pm
Forum: Macro and Micro Technique and Technical Discussions
Topic: determining magnification for use in DOF calculation
Replies: 8
Views: 3675

Typically, magnification determines a step size, not number of steps. The step size tells you how much you need to change the camera-to-subject distance between each shot, but in itself doesn't determine how many shots you need to take. If you determine that for your particular magnification and you...
by hero
Thu Jan 03, 2019 11:27 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Next steps to improve magnification?
Replies: 17
Views: 5608

If I may provide my amateur opinion... the issue with using extension tubes or teleconverters on consumer system lenses that are designed to provide at most 1:1 magnification, is twofold. First, the effective aperture becomes quite small and diffraction is high. Second, the lens is being used in a w...
by hero
Wed Jan 02, 2019 10:59 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: determining magnification for use in DOF calculation
Replies: 8
Views: 3675

I think perhaps you might have misunderstood the formula. It isn't the actual physical dimensions of the sensor that is in the numerator, but rather, the size of the image of the subject projected onto the sensor. Let's walk through a thought experiment. Suppose you take a photograph of a metric rul...
by hero
Sun Dec 23, 2018 2:04 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Lichen
Replies: 4
Views: 2767

Marvelous! I enjoyed searching for the structure you magnified at 10x... it's located about 1/4 from the right side and about 1/3 from the top.
by hero
Fri Dec 21, 2018 11:31 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Lichen Landscape
Replies: 9
Views: 5396

This image so effectively captures the notion of "worlds within worlds." :D
by hero
Sun Dec 16, 2018 10:50 am
Forum: Equipment Discussions
Topic: Flocking Question
Replies: 2
Views: 2178

If you want to do it quickly and don't have intentions to disassemble or rearrange the components, then flock the larger sections with a single piece of material. If you like arts and crafts and enjoy being meticulous, then flock the individual parts like I did. If you have enough flocking material-...
by hero
Sat Dec 15, 2018 11:16 pm
Forum: Macro and Micro Technique and Technical Discussions
Topic: Help with picture technique
Replies: 14
Views: 6548

At 1/500 seconds, there shouldn't be substantial motion blur. However, subject movement during a stack can cause problems. A flower can move quite a lot as it wilts, so proper mounting is needed to mitigate this effect. Flocking is more important than you might think, so I recommend that as your nex...
by hero
Fri Dec 14, 2018 4:36 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Axinite
Replies: 12
Views: 3232

Micromounts and thumbnails generally are not very expensive unless the species is rare, and nice ones can be had for less than a filter ring adapter. Besides, the point is to take photos of tiny things, so a mineral or crystal that is larger than a few millimeters, I find, doesn't have as much appea...
by hero
Wed Dec 12, 2018 1:51 pm
Forum: Equipment Discussions
Topic: Raynox DCR-250 - length of extention tube
Replies: 3
Views: 2553

I'm not an expert but the Raynox DCR-250 has a shorter focal length than the DCR-150 (which is what I use) when both are mounted in the normal orientation, and the DCR-150 is I think about 208 mm, so the 125 mm focal length that you cite is for the normal orientation. I would imagine that reversing ...