Looking for NFK 2.5x LD relay lens and Olympus OM L phototube

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Traleah
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Looking for NFK 2.5x LD relay lens and Olympus OM L phototube

#1 Post by Traleah » Wed Sep 16, 2020 4:39 am

I am looking for an NFK 2.5x LD relay lens and an Olympus OM L phototube adapter.
Thank you.
Last edited by Traleah on Wed Sep 16, 2020 4:58 am, edited 1 time in total.

PeteM
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Re: Looking for NFK 2.5x LD photo eyepiece and Olympus OM L phototube

#2 Post by PeteM » Wed Sep 16, 2020 4:56 am

No personal experience, M, with this seller or product; but it looks like an affordable solution. You'll still need the relay lens:

https://www.ebay.com/itm/Olympus-OM-mou ... SwMTFeEk6c

This seller specializes in camera adapters and might offer advice. For this one, you'd need the T-mount to Olympus adapter:

https://www.ebay.com/itm/Olympus-SPT-U- ... SwydNdPRZ9

Traleah
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Re: Looking for NFK 2.5x LD relay lens and Olympus OM L phototube

#3 Post by Traleah » Wed Sep 16, 2020 5:03 am

Thanks PeteM. I actually had messaged both of those sellers asking if those parts were a duplicate of/could be used in place of the OM L phototube, but I did not hear back from one and the other did not address my questions. I can message them again, but maybe someone will have the parts available here.
Last edited by Traleah on Wed Sep 16, 2020 5:17 am, edited 1 time in total.

PeteM
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Re: Looking for NFK 2.5x LD relay lens and Olympus OM L phototube

#4 Post by PeteM » Wed Sep 16, 2020 5:11 am

If you haven't tried the second seller, newhoper, could be they'll be more immediately responsive? I haven't bought from him (her?) but they've offered a wide range for years, usually well documented.

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mrsonchus
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Re: Looking for NFK 2.5x LD relay lens and Olympus OM L phototube

#5 Post by mrsonchus » Wed Sep 16, 2020 6:19 am

Hi, a couple of very low-priced ones here and here....
John B

MichaelG.
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Re: Looking for NFK 2.5x LD relay lens and Olympus OM L phototube

#6 Post by MichaelG. » Wed Sep 16, 2020 9:08 am

mrsonchus wrote:
Wed Sep 16, 2020 6:19 am
Hi, a couple of very low-priced ones ...
.

It will be interesting to see what they sell for

MichaelG.
Too many 'projects'

Traleah
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Re: Looking for NFK 2.5x LD relay lens and Olympus OM L phototube

#7 Post by Traleah » Wed Sep 16, 2020 1:21 pm

Thank you for those links. I’m in WA State, so I’ll have to ask about shipping and any other costs. The seller mentions pick up, but not shipping.

Element 56
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Re: Looking for NFK 2.5x LD relay lens and Olympus OM L phototube

#8 Post by Element 56 » Wed Sep 16, 2020 1:42 pm

In the simplest of terms it is for the most part nothing more than a spacer and connector. If you look for the specs of the original tube and compare to the aftermarket versions you should have a winner. Maybe Alan Wood has the specs on his site?

The photo eyepiece will show up on eBay and they go for 75-$100 USD.

Kirby

Scarodactyl
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Re: Looking for NFK 2.5x LD relay lens and Olympus OM L phototube

#9 Post by Scarodactyl » Wed Sep 16, 2020 2:25 pm

It's not hard to convert a cheaper olympus photobox to take a modern dslr: viewtopic.php?f=9&t=9093

Traleah
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Re: Looking for NFK 2.5x LD relay lens and Olympus OM L phototube

#10 Post by Traleah » Thu Sep 17, 2020 3:47 am

Kirby, I’ve seen 3.3x, but no 2.5x LD in my recent searches. I will keep looking, it must be one of those infrequently listed parts. Maybe someone here will have one to sell.

I’ve read over the information on Alan Wood’s site, some areas several times. There is a lot of information there. I had previously read the thread attached by Scarodactyl on using the photo box, but read it again. I understood the description better this time, but still am not able to find the parts, other than the photo box. Maybe I am using the wrong search terms.

Best scenario, I would like to find the OEM tube and the necessary relay lens. If a 3D print pattern for the phototube is available, I would try printing one.

I do appreciate the links and helpful information!

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Re: Looking for NFK 2.5x LD relay lens and Olympus OM L phototube

#11 Post by carlh6902 » Thu Sep 17, 2020 5:19 pm

Plan to spend at least $125 for an NFK2.5x.

Carl
--- If you're in the Kansas City area and you need help with an Olympus BH-2 scope, PM me. I love to work on these things ---

Element 56
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Re: Looking for NFK 2.5x LD relay lens and Olympus OM L phototube

#12 Post by Element 56 » Thu Sep 17, 2020 6:13 pm

Traleah wrote:
Thu Sep 17, 2020 3:47 am
Kirby, I’ve seen 3.3x, but no 2.5x LD in my recent searches. I will keep looking, it must be one of those infrequently listed parts. Maybe someone here will have one to sell.
They come up pretty often but if the price is reasonable you have to be quick. According to an advanced search on eBay no less than 13 of them sold since July and the prices were between 50 - 190 USD. Lenses auctioned account for the lower end prices.

You must be diligent when looking for something like this. When I'm in need I watch all day every day and if one comes up that's a bit pricey I let it go as another will surly follow. I can't tell you how many times I've jumped the gun thinking something is "rare" only to find it for much less a week or two later.

I frequently watch eBay and if I catch it in time I will let you know.

Kirby

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mrsonchus
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Re: Looking for NFK 2.5x LD relay lens and Olympus OM L phototube

#13 Post by mrsonchus » Thu Sep 17, 2020 6:24 pm

Element 56 wrote:
Thu Sep 17, 2020 6:13 pm
....................................
You must be diligent when looking for something like this. When I'm in need I watch all day every day and if one comes up that's a bit pricey I let it go as another will surly follow. I can't tell you how many times I've jumped the gun thinking something is "rare" only to find it for much less a week or two later.

I frequently watch eBay and if I catch it in time I will let you know.

Kirby
This is very good advice - I too have had this exact-same experience but now tend to be quite successful when searching for items. The trick is to be constantly checking and to act quickly, with experience this becomes very effective....
John B

Element 56
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Re: Looking for NFK 2.5x LD relay lens and Olympus OM L phototube

#14 Post by Element 56 » Thu Sep 17, 2020 6:37 pm

Found some but their expensive and I have no experience with these sellers.

https://www.spachoptics.com/olympus-nfk ... fk-2-5.htm

https://spectraservices.com/product/2-LC894.html

No price but it might be worth the time to ask,
http://yorkscientific.com/store/product ... bished.php

Kirby

wstenberg
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Re: Looking for NFK 2.5x LD relay lens and Olympus OM L phototube

#15 Post by wstenberg » Thu Sep 17, 2020 7:34 pm

I have one with the 3.3 lens.

PM me if interested.
William
Dallas, Texas

Zeiss Standard WL with POL
Zeiss Axiomat
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Traleah
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Re: Looking for NFK 2.5x LD relay lens and Olympus OM L phototube

#16 Post by Traleah » Fri Sep 18, 2020 2:15 pm

Carl and Kirby, thank you for those price expectations. It helps. Looking in the forum, I see others have purchased alternatives from eBay sellers (newhoper and 66x), so I may try one of their phototube substitutes if I cannot find the OM L.

I sent a price request to York and will post their response when I hear back from them.

Hopefully, this won’t take too many weeks!

PeteM
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Re: Looking for NFK 2.5x LD relay lens and Olympus OM L phototube

#17 Post by PeteM » Fri Sep 18, 2020 4:31 pm

There's also the option of using the same 10x eyepiece and shooting with your camera through it if you have a permanent setup. If you have a tripod or copy stand you could get try that. While this adds some extra glass, it also isolates the camera from the scope to reduce vibration and might give you better control of image size. The 2.5x relay lens is ideal for a full frame camera. Your sensor size really wants the lottery-priced 1.67x. The typical price of those could buy you a nice 20mp dedicated C-mount camera.

And for just quick capture, lots of cheap USB and HDMI cameras or just a cell phone holder.

Scarodactyl
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Re: Looking for NFK 2.5x LD relay lens and Olympus OM L phototube

#18 Post by Scarodactyl » Fri Sep 18, 2020 6:45 pm

Normal viewing eyepieces will not sit low enough in a bh2 trinoc port, and aren't as well corrected as the photo eyepieces anyway alas.

Tom Jones
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Re: Looking for NFK 2.5x LD relay lens and Olympus OM L phototube

#19 Post by Tom Jones » Fri Sep 18, 2020 7:13 pm

I have a spare OM adapter I'll sell, but no spare NFK 2.5x photoeyepiece.
$125 plus insured shipping. PM me if you're interested.

Tom

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Re: Looking for NFK 2.5x LD relay lens and Olympus OM L phototube

#20 Post by carlh6902 » Sat Sep 19, 2020 1:27 am

The WHK15 eyepieces will sit properly in the recess. Works well for afocal shooting.

Carl
--- If you're in the Kansas City area and you need help with an Olympus BH-2 scope, PM me. I love to work on these things ---

Element 56
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Re: Looking for NFK 2.5x LD relay lens and Olympus OM L phototube

#21 Post by Element 56 » Sat Sep 19, 2020 1:42 am

I forgot to mention Martin microscope. I priced their photo tube for the Olympus SZ stereo microscope and it's just over $500 if I recall correctly. I will probably be buying one for work at some point. They're great people and offer a money back guarantee. If you don't like it send it back! I like that.

Kirby

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Re: Looking for NFK 2.5x LD relay lens and Olympus OM L phototube

#22 Post by Scarodactyl » Sat Sep 19, 2020 11:55 am

Martin adapters are cool and all but I don't think there's ever a good reason to pay 500 dollars for a third party camera adapter.


Good point on the 15x--relative corrections won't matter much either since the periphery is already cropped off, if one can live with the smaller FoV.

Traleah
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Re: Looking for NFK 2.5x LD relay lens and Olympus OM L phototube

#23 Post by Traleah » Sat Sep 19, 2020 10:35 pm

Carl, thank you for the information about the WHK lenses.
Kirby, $500 is a bit much for me, but I’ll look around the Martin site, anyway.

I should be receiving a phototube and relay lens late next week so I’ll almost be ready to connect my camera.

I really appreciate everyone’s help!

Element 56
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Re: Looking for NFK 2.5x LD relay lens and Olympus OM L phototube

#24 Post by Element 56 » Tue Sep 22, 2020 1:51 am

Scarodactyl wrote:
Sat Sep 19, 2020 11:55 am
Martin adapters are cool and all but I don't think there's ever a good reason to pay 500 dollars for a third party camera adapter.


Good point on the 15x--relative corrections won't matter much either since the periphery is already cropped off, if one can live with the smaller FoV.
I think that's probably true for the hobbyist but for a university it's a cheap alternative to a new microscope or a dedicated camera. For $500 we can take great pics with our Canon T5 that everyone already knows to use.

Traleah,

Let us know how you make out with your system when you get it set up!

Kirby

Scarodactyl
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Re: Looking for NFK 2.5x LD relay lens and Olympus OM L phototube

#25 Post by Scarodactyl » Tue Sep 22, 2020 1:58 am

I guess I can't complain, since universities not worrying about cost generates a lot of my favorite surplus deals.

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