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WIng butterfly

 
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anto74



Joined: 06 Feb 2020
Posts: 66
Location: Italy

PostPosted: Wed Feb 19, 2020 1:22 pm    Post subject: WIng butterfly Reply with quote

Hello,
i'm testin my 20X but maybe my tube lenght from senosr plane to rear lens of Raynox DCR150 is wrong ( now is 210mm)
My Olympus 20X LM Plan FI 20/0.40 BD is 180mm.
I'm very confused Sad
Photo:
180 shots - 23X - step 3micron - size area 0,540mm - Sony a6100 - led light lamp
www.antoniodesantis.it/fs/texture.jpg
Antonio


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rjlittlefield
Site Admin


Joined: 01 Aug 2006
Posts: 20631
Location: Richland, Washington State, USA

PostPosted: Wed Feb 19, 2020 1:30 pm    Post subject: Reply with quote

Antonio,

The image looks good.

Because of the way you're using the Raynox, the "20X" objective will actually be giving a little higher magnification, something like 20*(210/180) = 23.3X .

Is something else confusing you?

--Rik
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anto74



Joined: 06 Feb 2020
Posts: 66
Location: Italy

PostPosted: Wed Feb 19, 2020 1:42 pm    Post subject: Reply with quote

Thanks Rik Smile
My confusion is about tube lenght:
https://www.photomacrography.net/forum/viewtopic.php?t=41137
Thanks again.
Antonio


rjlittlefield wrote:
Antonio,

The image looks good.

Because of the way you're using the Raynox, the "20X" objective will actually be giving a little higher magnification, something like 20*(210/180) = 23.3X .

Is something else confusing you?

--Rik
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Ultima_Gaina



Joined: 28 Jan 2017
Posts: 108

PostPosted: Mon Feb 24, 2020 2:17 pm    Post subject: Reply with quote

anto74 wrote:
Thanks Rik Smile
My confusion is about tube lenght:
https://www.photomacrography.net/forum/viewtopic.php?t=41137
Thanks again.
Antonio


rjlittlefield wrote:
Antonio,

The image looks good.

Because of the way you're using the Raynox, the "20X" objective will actually be giving a little higher magnification, something like 20*(210/180) = 23.3X .

Is something else confusing you?

--Rik


I suspect that you are using the 210mm tubes provided by WeMacro.

Even if not, here is the discussion on the same subject I had we Rik, who clarified how to precisely measure the exact tube length needed for infinity focus.

https://www.photomacrography.net/forum/viewtopic.php?t=35350&postdays=0&postorder=asc&start=78

You can't obtain the exact tube length from the segments provided by WeMAcro, but if you remove the 10mm segment, you'll end up very close to the ideal length.
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anto74



Joined: 06 Feb 2020
Posts: 66
Location: Italy

PostPosted: Tue Feb 25, 2020 1:15 am    Post subject: Reply with quote

Thanks for info! Smile
I'm using Mjkzz.de variable tube kit with Raynox DCR150.
The tube lenght is measured from sensor plane to front or rear lens of DCR150?
Thanks
Antonio

Ultima_Gaina wrote:
anto74 wrote:
Thanks Rik Smile
My confusion is about tube lenght:
https://www.photomacrography.net/forum/viewtopic.php?t=41137
Thanks again.
Antonio


rjlittlefield wrote:
Antonio,

The image looks good.

Because of the way you're using the Raynox, the "20X" objective will actually be giving a little higher magnification, something like 20*(210/180) = 23.3X .

Is something else confusing you?

--Rik


I suspect that you are using the 210mm tubes provided by WeMacro.

Even if not, here is the discussion on the same subject I had we Rik, who clarified how to precisely measure the exact tube length needed for infinity focus.

https://www.photomacrography.net/forum/viewtopic.php?t=35350&postdays=0&postorder=asc&start=78

You can't obtain the exact tube length from the segments provided by WeMAcro, but if you remove the 10mm segment, you'll end up very close to the ideal length.
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View user's profile Send private message Visit poster's website
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