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a newbies's homework

 
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Yawns



Joined: 20 Dec 2015
Posts: 64
Location: Portugal

PostPosted: Thu Sep 01, 2016 4:14 pm    Post subject: a newbies's homework Reply with quote

I was reading threads here about Raynox as a tube lens and decided to try it..

House fly (the usual victims... they are always at hand)
RAYNOX AS TUBE... RAYNOX REVERSED



Studio stack
Location: Benavente - Portugal

Camera : Nikon D7000
Objective: Nikon 4X E plan Achromat (Nikon Part # MRP70040)
Other : Raynox 250 (reversed) as "Tube"
Magnification: 2,50 "ish"
Lens Settings: iso 100, speed 1/2 ”, aperture f/4
Stack # : 169 photos - steps of 32 micron (estimated)
Manual rail - Manfrotto 454.
Lighting : 3 cool white (6.000K) led lamps .. 2 on the sides, 1 on top.



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ChrisR
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Joined: 14 Mar 2009
Posts: 7177
Location: Near London, UK

PostPosted: Fri Sep 02, 2016 3:56 am    Post subject: Reply with quote

It's obviously working well!

For others:
    This is a cost-effective setup.
    For a Raynox 150 you'd want about 83mm (208-125) more extension where the helicoid is.
    Some would advise putting extension between the Raynox and the objective. (One can use 52mm or M42mm tubes, with adapters.) There may be a small improvement in quality, with the risk of vignetting (mostly with larger sensors).


The tricky bit can be getting two 52mm male threads together. Did you use a long female thread inside a "xxmm down to 52mm" step ring?
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Chris R
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boomblurt



Joined: 18 Aug 2013
Posts: 141
Location: Australia

PostPosted: Sat Sep 03, 2016 3:39 am    Post subject: Reply with quote

ebay has suitable adapters (eg http://www.ebay.com/itm/351668583143) ... a bit overpriced but cheaper alternatives do come up.
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Geoff
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GaryB



Joined: 29 Jul 2016
Posts: 373

PostPosted: Sun Sep 18, 2016 4:17 pm    Post subject: Reply with quote

Nice picture!

I see a lot about using the Raynox lenses here and wondered what advantages these have over a standard camera lens as a tube lens. I ask because I have a number of camera lenses which serve the same purpose, so what is it about the Raynox that people prefer? I don't have one so I don't know what the difference is in setup and use but there's obviously something that people like about them.
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rjlittlefield
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Joined: 01 Aug 2006
Posts: 18165
Location: Richland, Washington State, USA

PostPosted: Sun Sep 18, 2016 4:45 pm    Post subject: Reply with quote

GaryB wrote:
so what is it about the Raynox that people prefer?

The word "prefer" may be too strong. Raynox is a known good solution that is not expensive, covers both APS-C and full frame with high quality image, does not vignette, and allows the overall magnification to be adjusted somewhat by changing camera-to-Raynox distance. If you need to buy a tube lens, Raynox is a good option. But if you already have another lens that works well, there is no great advantage to getting a Raynox also.

--Rik
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GaryB



Joined: 29 Jul 2016
Posts: 373

PostPosted: Sun Sep 18, 2016 5:02 pm    Post subject: Reply with quote

Ah, thanks.

I wasn't sure if the Raynox had some properties that made it more suitable than a camera lens. Still, you're right that it is cheaper and probable a lot less heavy as well as being quite versatile.
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Lou Jost



Joined: 04 Sep 2015
Posts: 1737
Location: Ecuador

PostPosted: Sun Sep 18, 2016 8:01 pm    Post subject: Reply with quote

I wonder what people would recommend as the best-quality tube lens for a 10x objective like a Mitu. There are lots of different options discussed in this forum but little consensus.
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Lou Jost
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slophotopro



Joined: 16 Sep 2016
Posts: 5
Location: Los Osos, ca

PostPosted: Mon Sep 19, 2016 9:40 am    Post subject: Reply with quote

Lou Jost wrote:
I wonder what people would recommend as the best-quality tube lens for a 10x objective like a Mitu. There are lots of different options discussed in this forum but little consensus.


http://www.photomacrography.net/forum/viewtopic.php?p=123660#123660

This might help.
reversing the lens means you are now working with a flat plane allowing one to get closer with out loosing focus on outer areas.

Looks like you are having fun.

Ron
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Yawns



Joined: 20 Dec 2015
Posts: 64
Location: Portugal

PostPosted: Sat Sep 24, 2016 6:27 am    Post subject: Thank you for all the replies... Reply with quote

@ Chris
Did you use a long female thread inside a "xxmm down to 52mm" step ring?

no.. the trick here is my 62mm to CFI.. it was machined by RAFCAMERA (Russia) and it's expensive but very clever adapter.. the 62mm external thread is both MALE and FEMALE.. so the adater can be flipped and used both ways.. If it was a regular adapter with only 62M I wouldn't be able to mount it.

http://www.ebay.com/itm/141997383975?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT

@bloomburt

Thank you for the link.. a 49mm Female / female and a 52mm Female / female rings were ordered (did not arrive yet)

@GaryB
I'm trying the Raynnox, just because I'm curious about to try things I read about here (and if I can afford them)
Just ordered some mineral rocks because of "Ploum" Smile

To all the other who added their opinions... thank you
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MarkSturtevant



Joined: 21 Nov 2015
Posts: 257

PostPosted: Tue Jan 10, 2017 8:44 pm    Post subject: Reply with quote

I think your rig includes the Pixco helicoid extension tube! I just bought one and am looking forward for a little package in the mail. How do you like it?
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Mark Sturtevant
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Getting-Old



Joined: 16 Mar 2017
Posts: 5
Location: Lancashire UK

PostPosted: Fri Mar 17, 2017 10:09 am    Post subject: Reply with quote

That’s a very sharp photo, well done!
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MarkSturtevant



Joined: 21 Nov 2015
Posts: 257

PostPosted: Fri Mar 17, 2017 11:16 am    Post subject: Reply with quote

GaryB wrote:
Nice picture!

I see a lot about using the Raynox lenses here and wondered what advantages these have over a standard camera lens as a tube lens. I ask because I have a number of camera lenses which serve the same purpose, so what is it about the Raynox that people prefer? I don't have one so I don't know what the difference is in setup and use but there's obviously something that people like about them.

A Raynox is also handy out in the field as a less fussy alternative to switching out lenses or extension tubes. Simply clip on the Raynox to whatever you have on now, and get a boost in magnification. I keep mine in a protective pouch in my front pocket when I am out and about.
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Mark Sturtevant
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microman



Joined: 14 Jan 2017
Posts: 67

PostPosted: Fri Mar 17, 2017 11:41 am    Post subject: Reply with quote

Great result ! Thanks for sharing setup. I am also interested in that objective but a bit unsure where to buy it since i live in europe. Ebay used prices seems higher than brand new..
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Lou Jost



Joined: 04 Sep 2015
Posts: 1737
Location: Ecuador

PostPosted: Fri Mar 17, 2017 11:47 am    Post subject: Reply with quote

Since this thread has been resuscitated, I'll ask whether the consensus is that the short Raynox should be reversed? I reverse my long one (208mm focal length) but use my short one (125mm focal length) facing forward. My reasons for doing this are lost in the mists of time.....
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Lou Jost
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Lou Jost



Joined: 04 Sep 2015
Posts: 1737
Location: Ecuador

PostPosted: Fri Mar 17, 2017 12:50 pm    Post subject: Reply with quote

Theoretically I suppose they should always be reversed, unless we have data to the contrary. They are meant for their front to be close to the subject and for their back to be facing a lens focussed at or close to infinity.
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