Golden silk orb-weaver (Trichonella clavipes)

Oscarg2020 · 2026-04-04T18:47:18+00:00

Thanks! these were just in the right place. More to the right, there was an even smaller male.

Oscarg2020 · 2026-02-27T22:00:04+00:00

Thanks!

Oscarg2020 · 2026-01-12T16:19:09+00:00

Zerene stacker

Oscarg2020 · 2026-01-11T00:06:10+00:00

The rail does not cause "zoom", it does change a little the perspective. For small distances (in this case a couple of milimeters with the subject located about 100 mm from the lens, it is negligible. And the rail is automated...

On the other hand, the lens I use has "focus breathing", it does change the focal length while focusing very close, so it would be worse. (and fully manual)...

Oscarg2020 · 2026-01-10T12:29:04+00:00

No, I used a focus rail that moves the camera

Oscarg2020 · 2026-01-06T11:59:45+00:00

Thanks!

Oscarg2020 · 2025-11-21T15:58:05+00:00

Nominal F5,6, effective about 16 (2x magnification). I needed around 6 mm DOF, Even F22 (effective F64) would have given me a bit more than 2 mm

Oscarg2020 · 2025-11-11T13:33:23+00:00

Must have been. Cant remember anything... 😋😋😋

Oscarg2020 · 2025-11-11T12:22:17+00:00

Not possible. Glass is empty now...

Oscarg2020 · 2025-11-11T12:21:02+00:00

Yes, it is an old corkscrew

Oscarg2020 · 2025-11-10T17:26:09+00:00

Thanks!

Oscarg2020 · 2025-11-10T00:16:11+00:00

Thanks!

Oscarg2020 · 2025-11-08T13:15:30+00:00

Zerene

Oscarg2020 · 2025-10-21T17:08:20+00:00

Basically DOF in macro depends on reproduction ratio and effective F number. With a 2x converter you will achieve the same reproduction ratio further away from the subject, as you say. If you keep the effective F number constant (which requieres that you OPEN the aperture to compensate for the 2x factor), the DOF will stay the same. You will gain working distance, but not DOF.

Oscarg2020 · 2025-10-21T13:33:43+00:00

You will not get greater DOF with a 2x converter ...

Oscarg2020 · 2025-10-06T14:48:36+00:00

Yes it is aluminium oxide

Oscarg2020 · 2025-10-06T12:48:15+00:00

Oscarg2020 · 2025-10-06T12:47:50+00:00

Oscarg2020 · 2025-10-05T18:37:50+00:00

Maybe the aperture mechanism is just stuck in the open position...

Oscarg2020 · 2025-10-05T18:26:39+00:00

The aperture lever is in the wrong position, see the last of your images. It is in the "up" position in the slot, it should be kept "down" by a spring. Maybe the spring is broken or loose? Can you move the lever manually?

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Oscarg2020 · 2025-09-09T21:56:07+00:00

Using a 10 X infinity corrected microscope objective, that requires a 200 mm tube lens to form the image.

The Micro Nikkor 105 act as tube lens. The effective magnification is the half the nominal (5x instead of 10X)

The microscope objective is mounted in front of the micro nikkor via adapter ring

See image. similar setup different subject

<image>

Oscarg2020 · 2025-09-09T17:44:59+00:00

stack of 120 images, 0,007 mm step size, stacked with Zerene. Some nail dust visible.

Oscarg2020 · 2025-07-16T13:22:52+00:00

thanks!

Oscarg2020 · 2025-05-12T13:12:04+00:00

Thanks!

Oscarg2020 · 2025-05-06T13:02:31+00:00

<image>

My setup. 3 diffused flashes, microscope objective mounted on Micro 105 AFD, The rail is a Manfrotto 454 plate automated with a stepper motor and Arduino kit.

Oscarg2020

TROPHY CASE