NikonGear'23

Images => Nature, Flora, Fauna & Landscapes => Topic started by: bobfriedman on March 29, 2020, 00:47:08

Title: Monte Casino Aster
Post by: bobfriedman on March 29, 2020, 00:47:08
Nikon D850 ,Rodenstock Apo-Rodagon-D 75mm f/4.5 1X
1/50s f/4.5 at 74.0mm iso200 23-stack
(https://pbase.com/bobfriedman/image/170554722/original.jpg)
Title: Re: Monte Casino Aster
Post by: Akira on March 29, 2020, 00:52:57
Love the beautiful color contrast between bluish purple and light green.  The overall delicate rendition looks nice, too.
Title: Re: Monte Casino Aster
Post by: Andrew on March 29, 2020, 11:26:28
You strike again!
So nice...
Title: Re: Monte Casino Aster
Post by: Nasos Kosmas on March 29, 2020, 22:34:59
Jump out of the screen :)
Title: Re: Monte Casino Aster
Post by: Jakov Minić on March 30, 2020, 15:01:03
The lighting is perfect. I like it!
Title: Re: Monte Casino Aster
Post by: PeterN on March 30, 2020, 15:51:15
I can only underscore what has been said!
Wonderful !
Title: Re: Monte Casino Aster
Post by: Fons Baerken on March 30, 2020, 18:30:40
Where do you find an Aster 'Monte Casino' this time of the year? ;)
Title: Re: Monte Casino Aster
Post by: bobfriedman on March 30, 2020, 22:13:35
Quote from: Fons Baerken on March 30, 2020, 18:30:40
Where do you find an Aster 'Monte Casino' this time of the year? ;)

the flower store?... before they closed all of them due to the quarantine.
Title: Re: Monte Casino Aster
Post by: HCS on April 01, 2020, 10:45:23
Gorgeous Bob!

May i ask whether you used the D850 focus shift function and if yes, which step size?
Title: Re: Monte Casino Aster
Post by: bobfriedman on April 01, 2020, 11:30:55
Quote from: HCS on April 01, 2020, 10:45:23
May i ask whether you used the D850 focus shift function and if yes, which step size?

so the rig I used was a Cambo Actus Ultima II converted to XL35 with a focus knob on the rear standard. I manually adjusted the focus step. I have purchased a modification that will allow a stackshot motor to be attached to the rear standard focus knob but cannot get the focus knob off the rear standard due to a frozen focus knob set screw. I am hoping that I can free that screw with lubricating oil but it might take days to penetrate. if I can ever get the focus knob off I will be able to replace with the stackshot motor and assoicated Cambo bracket assembly and automate the entire process using the stackshot controller.

step size was by eye and trial and error. with the high mag macro using the Mitutoyo Metallurgic objectives I had the manufactures DoF rating and I could calculate the step size. I guess I could try and calculate the DoF for this lens and then half it for a step size.
Title: Re: Monte Casino Aster
Post by: HCS on April 01, 2020, 15:50:59
Thanks for your detailed reply, i appreciate that.

It's a lot of work like this, but the result is worth it!
Title: Re: Monte Casino Aster
Post by: bobfriedman on April 02, 2020, 01:26:39
still can't free the focus knob set screw
Title: Re: Monte Casino Aster
Post by: bobfriedman on April 05, 2020, 14:33:50
success after of four days of penetrating oil and tapping with a hex wrench with a hammer I finally freed the set screw and was able to modify the Cambo Actus with the stack shot motor and controller.