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Büchse der Pandora in Aluminium

 
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Guppy



Joined: 20 Dec 2010
Posts: 51
Location: Switzerland
PostPosted: Fri Feb 14, 2014 2:45 pm    Post subject: Büchse der Pandora in Aluminium Reply with quote
This time is Pandora's Box a Aluminium Tube.
I use the NIKON M Plan, 60/0.7 LWD, 210/0, with 60:1, Sharpness depth 1.1µm.
The picture width amounts 0.39mm.
These were 427 pictures, stack with Zerene.
The steps are 0.25 µm.

Kurt



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Last edited by Guppy on Mon Feb 24, 2014 8:39 am; edited 1 time in total
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rjlittlefield
Site Admin


Joined: 01 Aug 2006
Posts: 19090
Location: Richland, Washington State, USA
PostPosted: Fri Feb 14, 2014 4:41 pm    Post subject: Re: Büchse der Pandora in Aluminium Reply with quote
This is beautiful!

Guppy wrote:
I use the NIKON M Plan, 60/0.7 LWD, 210/0, with 60:1, Sharpness depth 0.6µm.

To clarify... It looks like you're using a "sharpness depth" that is measured as maximum deviation from the point of sharpest focus. The total DOF is twice as much. The formula for total DOF is lambda/NA^2, which for green light at lambda=550nm would be 1.12 µm. Because this subject has a lot of blue in it, we might use lambda=450nm to give a tighter estimate of 0.92 µm.

In either case, your steps of 0.25 µm are certainly small enough to avoid focus banding.

--Rik
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dolmadis



Joined: 07 Dec 2011
Posts: 467
Location: UK
PostPosted: Sat Feb 15, 2014 1:45 am    Post subject: Reply with quote
Hi Kurt

Can you share the details of the tube you used please?

Thanks

John
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Guppy



Joined: 20 Dec 2010
Posts: 51
Location: Switzerland
PostPosted: Sat Feb 15, 2014 4:31 am    Post subject: Reply with quote
Hi John

looking at the following address:
http://www.photomacrography.net/forum/viewtopic.php?t=22725
This Time the tube is in aluminum and not in PVC, without a second tube.

Kurt
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dolmadis



Joined: 07 Dec 2011
Posts: 467
Location: UK
PostPosted: Sat Feb 15, 2014 5:03 am    Post subject: Reply with quote
Thank you, Kurt.

John
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baro-nite



Joined: 25 Feb 2013
Posts: 58
Location: North Carolina, USA
PostPosted: Sat Feb 15, 2014 12:08 pm    Post subject: Reply with quote
Extraordinarily beautiful work, and an inventive and elegant technique.
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Jeff S
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abpho



Joined: 17 Aug 2011
Posts: 1426
Location: Earth
PostPosted: Sun Feb 16, 2014 8:15 pm    Post subject: Reply with quote
Beautiful image.
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RogelioMoreno



Joined: 20 Nov 2009
Posts: 2957
Location: Panama
PostPosted: Mon Feb 17, 2014 7:42 am    Post subject: Reply with quote
Beautiful picture!

Rogelio
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abpho



Joined: 17 Aug 2011
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PostPosted: Sat Mar 01, 2014 4:35 pm    Post subject: Reply with quote
Congrats Kurt.
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jazzper



Joined: 29 Mar 2013
Posts: 145
Location: Copenhagen, Denmark
PostPosted: Mon Mar 03, 2014 8:00 am    Post subject: Reply with quote
This is an absolutely brilliant idea! And the result is beautiful as well - great work!
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Yousef Alhabshi



Joined: 04 Feb 2011
Posts: 168
Location: United Arab Emirates
PostPosted: Mon Mar 10, 2014 4:15 am    Post subject: Reply with quote
Superb.. amazing sharpness at this level of magnification.

Congrats
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