Olympus UK E-System User Group
Olympus UK E-System User Group

Join our unique resource for Olympus Four Thirds E-System DSLR and Pen and OM-D Micro Four Thirds photographers. Show your images via our free e-group photo gallery. Please read the e-group.uk.net forum terms and conditions before posting for the first time. Above all, welcome!


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Looking for improvement This is the e-group critique board. If you post a picture here it will be assumed that you are looking for comprehensive technical feedback - both good and bad, but always respectful. Only post pictures here if you can deal with potentially negative constructive criticism. Anyone is qualified to comment and post feedback, and everyone is encouraged to do so. NB: "Looking for Improvement" is the place to post any pictures you would like advice on improving, no matter how bad you might think they are.

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Old 5th December 2011
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Stacked macro photos of wasp’s head

The camera, lighting and setup was very Heath Robinson and the final stacked image is made up of 12 Olympus E5 raw format images stacked together using a trial version of Helicon Focus.



I have tried using Photoshop to stack, but it either complains about lack of RAM or produces a final image in which all the detail is lost.

Any thoughts on the image?
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Old 5th December 2011
sponner sponner is offline
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Re: Stacked macro photos of wasp’s head

scary!

looks seriousley good to me.
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Old 5th December 2011
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Re: Stacked macro photos of wasp’s head

Very good indeed. I'm suprised he stayed still enough to get 12 frames at different focus.
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Old 5th December 2011
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Re: Stacked macro photos of wasp’s head

Thanks for the comments.

Paul, the wasp was a very cooperative model – probably only because it was dead and its back end was glued onto a phone card
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Old 5th December 2011
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Re: Stacked macro photos of wasp’s head

I'm impressed. Presumably you used that 50mm macro?
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Old 5th December 2011
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Re: Stacked macro photos of wasp’s head

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Originally Posted by StephenL View Post
I'm impressed. Presumably you used that 50mm macro?
Surprisingly no - the setup was too Heath Robinson for that lens to be used.

I used an old OM mount 50mm Macro Lens, on an old OM Auto Bellows and adjusted to the magnification so that the wasps head filled the frame.

This was all mounted on a wooden base, onto which I had fitted a digital linear scale. Each movement of the Auto Bellows is measured by the digital linear scale, and displayed on an LCD read-out. The resolution of the scale means that I can move by increments as small as 0.001” (0.0254 millimetres).

Lighting was done using a couple of remote diffused YN460-II flashguns, with a further diffuser (part of a cut up milk carton) over the wasp.

The wasp was glued to a phone card, which was sellotaped to a wooden base, which was fitted onto a collection of other bits and pieces which let me position the wasp to capture his best side.

Once you know the magnification ratio of your final image, this used along with the aperture to calculate the depth of field of the focussed image.

Looking through your camera view finder, or even better Live View, using the LCD read-out on the digital linear scale you then measure the distance between your first and last images, and then divide this by your depth of field to find how many images the stack needs.
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Old 5th December 2011
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Re: Stacked macro photos of wasp’s head

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Originally Posted by ChrisW View Post
Paul, the wasp was a very cooperative model – probably only because it was dead and its back end was glued onto a phone card
LOL. I'm guessing it would not qualify as a wildlife shot then and more of a still life.
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Old 5th December 2011
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Re: Stacked macro photos of wasp’s head

Seriously impressed.

As this is LfP I'll make a couple of other comments. Was this sharpened, the details look a bit softer than ideal but come up beautifully with a slight sharpen. I'd play just a bit with curves to add a touch more contrast - and then slightly reduce the overall saturation (curves seems to do something to saturation) to match the original.

Nick
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Re: Stacked macro photos of wasp’s head

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Originally Posted by Nick Temple-Fry View Post
Seriously impressed.

As this is LfP I'll make a couple of other comments. Was this sharpened, the details look a bit softer than ideal but come up beautifully with a slight sharpen. I'd play just a bit with curves to add a touch more contrast - and then slightly reduce the overall saturation (curves seems to do something to saturation) to match the original.

Nick
Thanks Nick.

The face and eyes were sharpened after the images were stacked. Other than that everything else is as it came from the RAW camera files.

Please feel free to experiment with the photo and tweak it any way you see fit. I am always open to suggestions and very interested as to how images can be improved.
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Old 5th December 2011
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Re: Stacked macro photos of wasp’s head

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Originally Posted by OlyPaul View Post
LOL. I'm guessing it would not qualify as a wildlife shot then and more of a still life.
Very very still life
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Old 5th December 2011
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Re: Stacked macro photos of wasp’s head

Quote:
Originally Posted by ChrisW View Post
Thanks for the comments.

Paul, the wasp was a very cooperative model – probably only because it was dead and its back end was glued onto a phone card
Superb photo Chris, beautiful detail and very sharp.

Does anyone use phone cards anymore?

Steve
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Old 5th December 2011
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Re: Stacked macro photos of wasp’s head

what are stacked photos? Incredinle photo is that all down to the macro lens?
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Old 5th December 2011
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Re: Stacked macro photos of wasp’s head

I've just about finished a 'stacking rail' for macro photography. It's basically a carriage driven by a stepper motor through a leadscrew. The rail is controlled by an 'arduino' controller. The motor is 200 steps per rev and the leadscrew has a pitch of 1.5mm. This gives the smallest theoretical step of 0.0075 mm.

I input the lens aperture, actual size of object (height or width), size of object on sensor (as above and measured on the live view screen), depth of object (front to back), and 'pupil ratio' (this is the ratio of the lens entrance to exit pupils. I'm using 1 for now until I can determine otherwise for the lenses I intend to use.)

The software calculates the depth of field, and making an allowance for overlap, steps the carriage and takes the images - all automatically.

I'll post images of the rail and any results when it's completed.

Jim
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Re: Stacked macro photos of wasp’s head

Jim, I am very interested to see your setup – sounds very good. Any thoughts on which software you will use for stacking?

These are the two parts of my Heath Robinson stacking rig. The camera body fits onto an OM Auto Bellows which is fixed to an aluminium plate, which is then fixed to a wooden base. The digital read out measures the distance moved by the entire Auto Bellows.








This is the stacking subject holder, the tin can on the left is a balance weight and I use an old vertical machining table for finely adjusting the vertical movement of the subject. I use a milk carton over the subject to diffuse the light.




Finally there is the Excel spreadsheet to do the stacking calculation
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Old 6th December 2011
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Re: Stacked macro photos of wasp’s head

Wow - gear porn par excellence!

Seriously, it's very interesting, thanks for showing us.


Ciao ... John
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