Peter Heckert2

Peter Heckert2

Lives in Germany, between Stuttgart and Heilbronn
Works as a Electronics technician
Joined on Feb 11, 2012
About me:

59 now. Excpecting the coming years and making the very best out of it.

Comments

Total: 23, showing: 1 – 20
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On Olympus OM-D E-M1 Review preview (2143 comments in total)

So it is proven it can focus on white horses with black belts.
Whats about black horses with black belts?
;-)

Direct link | Posted on Sep 13, 2013 at 06:34 UTC as 315th comment
On wcrP7080038 photo in Peter Heckert2's photo gallery (1 comment in total)

Taken with Zeiss 20x-75x eyepiece and Sigma 30mm.

Direct link | Posted on Jul 8, 2013 at 21:56 UTC as 1st comment
On wcrP7080096 photo in Peter Heckert2's photo gallery (1 comment in total)

Taken with Zeiss 20x-75x eyepiece and Sigma 30mm.

Direct link | Posted on Jul 8, 2013 at 21:55 UTC as 1st comment
On wcrP7080066 photo in Peter Heckert2's photo gallery (1 comment in total)

Taken with Zeiss 20x-75x eyepiece and Sigma 30mm.

Direct link | Posted on Jul 8, 2013 at 21:55 UTC as 1st comment
On wrP7080081 photo in Peter Heckert2's photo gallery (1 comment in total)

Spotting scope with original Zeiss 20x - 75x eyepiece.
At the eyepiece is an adapter, that I made from cardboard. It fits almost exactly the 46mm filterthread of the Sigma 30mm objective. The inner diameter of the rubber ring is just a little bit smaller than 46mm this is a nice match!

I intend to insert a straylens into the adapter, this should improve field flatness and autofocus. Quality surplus lenses that could do the trick, are available on ebay for cheap.

Direct link | Posted on Jul 8, 2013 at 21:50 UTC as 1st comment
On wcrP6160005 photo in Peter Heckert2's photo gallery (1 comment in total)

So far my best BIF shot with the spotting scope.
I want to go high up in the vineyard, where the redtailed hawks come rather close sometimes and hope for better shots.

Direct link | Posted on Jul 2, 2013 at 12:24 UTC as 1st comment
On wP7010026 photo in Peter Heckert2's photo gallery (1 comment in total)

Another example at 850mm with Oly 12-50 and XW20.
This is sharper. At good light and shorter exposure times, the shutter shock should not be a problem for me anymore.
CA can be adressed via PP, but I hope the new Hyperion eyepiece will improve it.

Direct link | Posted on Jul 1, 2013 at 18:40 UTC as 1st comment
On wP7010023 photo in Peter Heckert2's photo gallery (1 comment in total)

Normally I prefer to use letter stamps at a 5m distance for testing purposes. Because the patterns repeat over and over, center sharpness and corner sharpness is easier to compare.

At the perforation holes it is easy to see CA. Also distortion is easy to see.

There is still some loss due to shutter shock.

With a sony a57 with electronic first curtain enabled there is no shutter shock at all and it is so sharp, that the printing dots can be seen.
Also I see the dots in the focus magnifier of the OM-D as preview, but not in the resulting image.

Direct link | Posted on Jul 1, 2013 at 16:45 UTC as 1st comment
On wP7010024 photo in Peter Heckert2's photo gallery (1 comment in total)

5 Euro on a 5m distance ;-)
Focal length 750mm. OOC JPEG without postprocessing.

Pentax XW20 + Oly 12-50 was used.
I think it is sharp. The blur in the corners might be not so good, but partially this is spheric abberationj, that means if I focus to the corner, it will be sharp, but the center will be unsharp. To some degree this cannot be avoided with telescopes and spotting scopes.

It has pincushion distortion and CA that is too bad for an expensive eyepiece like this.

Direct link | Posted on Jul 1, 2013 at 16:42 UTC as 1st comment
On wcrP6300123 photo in Peter Heckert2's photo gallery (1 comment in total)

This is taken at 1000mm (optical) or 2000mm( equiv) focal length and cropped.
You see, how unsharp and bad the XW20 is (this was used).
OK, I admit, some PP was required.

Direct link | Posted on Jun 30, 2013 at 19:24 UTC as 1st comment
On wcrP6160100-600mm photo in Peter Heckert2's photo gallery (2 comments in total)

Shot with Sigma 30mm and Hyperion Mark III zoom eyepiece.
This eyepiece is nice, there was no noticable CA and it is very sharp at the focus location, so crops are sharp, but as all zoom eyepieces it has spherical abberation which gives corner sharpness problems.

So I want to replace it by the Oly 12-50mm and a fixed 20mm eyepiece. Unfortunately Zeiss has nothing like this, but Astro eyepieces can be adapted.

Direct link | Posted on Jun 30, 2013 at 19:14 UTC as 1st comment
On wDSC07763 photo in Peter Heckert2's photo gallery (1 comment in total)

I use the Pentax XW20 eyepiece.
This is expensive and the filter thread must be cut off to use it on the diascope.

Anyway - Olympus MFT 2x Teleconverter is much more expensive ;-)

I hope to try a Hyperion 21mm soon. It is said, this is sharper, has less distortion and less CA. And it is cheaper. Let's see when it comes...

Direct link | Posted on Jun 30, 2013 at 19:04 UTC as 1st comment
On wcrP6160100-600mm photo in Peter Heckert2's photo gallery (2 comments in total)

Shot at daylight with Sigma 30mm, Zeiss 85T FL and Hyperion Mark III.
Focus method: Autofocus.

Direct link | Posted on Jun 30, 2013 at 11:57 UTC as 2nd comment

If the EVF had 2x and 3x focus magnification would be more useful to me than an increased pixel count. Why increase the pixel count?

Direct link | Posted on Apr 11, 2013 at 16:07 UTC as 11th comment | 1 reply
In reply to:

Peter Heckert2: Digiscoping is extreme teleshooting at slow shutter speed and high magnification.

MFT is not good for this in my opinion.
Long exposure times are needed.
The shutter shock ruins the sharpness at 500mm and above. I tried it with G3 and OMD and a Zeiss diascope.
Results with a Sony A57 and electronic first curtain are much sharper.

The best results in digiscoping are achieved by compact cameras,DSLR with mirror lockup, or Sony SLT or better NEX with electronic first curtain. Especially focus peaking is very helful, so MFT is the worst choice for this type of fotography in my opinion.

Goto flickr and search for "Zeiss diascope" and you see the equipment that people use and the -sometimes amazing- results they get.

To add this: The autofocus, especially pinpoint autofocus is usable and it is a pity that shutter shock disturbs so much.

Direct link | Posted on Mar 30, 2013 at 12:58 UTC

Digiscoping is extreme teleshooting at slow shutter speed and high magnification.

MFT is not good for this in my opinion.
Long exposure times are needed.
The shutter shock ruins the sharpness at 500mm and above. I tried it with G3 and OMD and a Zeiss diascope.
Results with a Sony A57 and electronic first curtain are much sharper.

The best results in digiscoping are achieved by compact cameras,DSLR with mirror lockup, or Sony SLT or better NEX with electronic first curtain. Especially focus peaking is very helful, so MFT is the worst choice for this type of fotography in my opinion.

Goto flickr and search for "Zeiss diascope" and you see the equipment that people use and the -sometimes amazing- results they get.

Direct link | Posted on Mar 30, 2013 at 12:20 UTC as 11th comment | 3 replies
In reply to:

Peter Heckert2: It is to consider, light does not come in from an recticular angle as shown in the advertisement images above.
It comes from all angles with bright lenses and if aperture or focal length (zoom factor) changes, the angles will change. So it must be much more complicated and sophisticated, if this should be an universal sensor for ILS cameras.

I suspect it is for webcams and cellphones only.

I would want to hope so, but no lens does change the angle of a light beam that goes straight through the center of the lens.

This is already a problem with Bayer sensors and wide angle lenses, false colors in corners can occur.

Sorry, I am a little bit pessimistic to see this soon in a Camera ;-)

Direct link | Posted on Feb 4, 2013 at 19:51 UTC

It is to consider, light does not come in from an recticular angle as shown in the advertisement images above.
It comes from all angles with bright lenses and if aperture or focal length (zoom factor) changes, the angles will change. So it must be much more complicated and sophisticated, if this should be an universal sensor for ILS cameras.

I suspect it is for webcams and cellphones only.

Direct link | Posted on Feb 4, 2013 at 19:29 UTC as 23rd comment | 3 replies

Possibly this must be calibrated to the lens in use and so could prevent usage of arbitrary lenses. So is this for fixed lenses only?

Direct link | Posted on Feb 4, 2013 at 19:07 UTC as 26th comment | 3 replies

Set a magnifying lens in front of the sensor, and you get a bigger sensor.
Set a stray lens in front of the sensor and you get a smaller sensor.
Its that easy ;-)

Ok it is not so easy to maintain the focus distances, but it is possible.

Hopefully the ridiculous urban legend about sensor size and DOF will die now.

Peter

Direct link | Posted on Jan 14, 2013 at 16:39 UTC as 102nd comment | 2 replies
Total: 23, showing: 1 – 20
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