Author Topic: ZnSe lenses on Ebay  (Read 8779 times)

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Online Fraser

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Re: ZnSe lenses on Ebay
« Reply #25 on: October 04, 2018, 11:46:20 am »
The Exx has a convenient rubber lip extending around the front of the lens. This acts as a very effective grip ring around any disc shaped adapter you might make. Some thing like the original 3D printed combined disc and cone adapters used with the E4 comes to mind.

There is also the official supplimental lens mount option. You remove the silver lens trim and fit a bayonet mount lens holder in its place. Helpfully some kind person has already designed and published such a bayonet mount adapter for a 20mm supplimental lens. It was intended to be used with a different camera series but fits the Exx series perfectly as FLIR use a common mount between the series.

I will add the thingiverse URL for the adapter in a minute.

Fraser
« Last Edit: October 04, 2018, 01:04:22 pm by Fraser »
 

Online Fraser

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Re: ZnSe lenses on Ebay
« Reply #26 on: October 04, 2018, 11:48:55 am »
OK, here is the bayonet mount close up lens adapter I mentioned and also the link to the original E4 lens adapter.

https://www.thingiverse.com/thing:1078735

https://www.thingiverse.com/thing:187166

Fraser
« Last Edit: October 04, 2018, 12:03:07 pm by Fraser »
 

Online Fraser

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Re: ZnSe lenses on Ebay
« Reply #27 on: October 04, 2018, 11:58:03 am »
As can be seen in the example pictures in the Thingiverse bayonet mount project, the 25 degree FOV of the cameras fixed lens, combined with positioning of the 20mm supplimental lens in front of it means little vignetting is visible in close up imaging. Certainly good enough for PCB work. The 25mm will be better but you will need to modify the 3D design to accommodate it. You could buy a 20mm lens as well to play with as they are very affordable :)

I printed the bayonet mount lens adapter in ABS and it fits my E40 perfectly. I am using that design as the basis of an adapter I need for a FLUKE bayonet mount X2 telescope supplimental lens. Just need the time to tinker with it.

Fraser
« Last Edit: October 04, 2018, 12:06:31 pm by Fraser »
 

Offline Uho

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Re: ZnSe lenses on Ebay
« Reply #28 on: October 21, 2018, 10:38:44 am »
Recently, at the request of a friend from the thermal imaging forum made a universal holder for macro and body lenses under the FLIR E series. Holders macrolens for FLIR you can find several types of on the Internet. They are all United by the principle of fastening - due to friction. But it's not very reliable. When shaking the lens may fall out. They fight very easily, and the price is not small. And on this principle it is impossible to fix heavier multi-lens lenses. What I wanted to achieve:
1. Reliability of lens mounting.
2. Universality.
3. The opportunity to obtain low distortion of the image.
If you want a large magnification then the idea of using a single lens doesn't work very well. The photo shows image distortion if you use an f25mm selenide lens. Two lenses F38.1mm is better work there. Less distortion. The different lenses can be set in different sequences to get the required magnification in macro mode from 1x to 8x. More expensive germanium lenses with a maximum diameter of 28 mm will provide a low level of distortion (spherical and chromatic aberration and distortion of the "pillow" / "sheet"), a better signal / noise ratio. Cheaper lenses made of zinc selenide of small diameter will allow you to get a budget option with low cost optics, but are still used for simple works. Thus, the adapter provides maximum flexibility in the use of existing lenses, cheaper or more expensive.
Where do we need such holder and macro lens, for example, in the field of medicine - photo palm. Macro lenses For the use of electronics diagnostics-photo phone. Well, in addition to this, you can install a telephoto lens in such a holder.
The plastic part of the holder on a 3D printer was printed and then polished on a lathe. Holders lenses sharpened then polished and anodirovanie.
A short video about the device holder can be found here
https://youtu.be/UG-XuUb1GrU
 

Online KE5FX

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Re: ZnSe lenses on Ebay
« Reply #29 on: October 21, 2018, 08:51:14 pm »
Recently, at the request of a friend from the thermal imaging forum made a universal holder for macro and body lenses under the FLIR E series.

That looks great.  Are they selling those?  I've been using copper tape to mount a ZnSe lens on my E4, and it would be nice to have an option for easier insertion/removal.
 

Online KE5FX

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Re: ZnSe lenses on Ebay
« Reply #30 on: October 30, 2018, 12:24:15 am »


Seriously.  Somebody sell me something.  |O

 

Offline Uho

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Re: ZnSe lenses on Ebay
« Reply #31 on: November 01, 2018, 12:31:19 pm »
I can make a holder for you. With one lens tube the price of $ 50 does not include shipping.
 

Online KE5FX

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Re: ZnSe lenses on Ebay
« Reply #32 on: November 01, 2018, 11:24:33 pm »
I can make a holder for you. With one lens tube the price of $ 50 does not include shipping.

PM sent.
 

Offline Pinkus

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Re: ZnSe lens for E30/E40/E60
« Reply #33 on: February 20, 2019, 11:16:55 pm »
A while ago I asked Fraser for some advice regarding the correct ZNSE lens size/ focal lenght for building a macro lens (which he gave me).
Finally I purchased a ZNSE lens with a focal length of 100mm and a diameter of 25mm for my Flir Exx.  Remark: for the Exx you need the 25mm diameter - do not purchase a smaller one!
Though an easy mounting was not possible, so I buildt a 3D printed holder for it. This took a while, but I had now time to finish it.

I am attaching a few photos and also the STL file for it, so you can print your own.
The holder consists of the bayonet clasp for the camera and an included lens holder with a separate ring. When printed, just insert the lens, press the ring on the front and you are all set. With the two small ball shaped handles you can easily insert/remove and rotate the unit.
Credits go to Kaji_fi who designed the bayonet (the lower 1.5 mm of the part) for a Flir T-series and that I borrowed for this.

I am also attaching a comparison between the regular lens and the added ZNSE. You are able to get much closer and by using the focus ring of the camera you are able to select the distance you like and then use the focus ring to focus. By this you have a kind of zoom-feature. This is now way better for working on electronics!
I purchased the lens here (I am not related to the seller): https://www.ebay.com/itm/152310493227; though it took approx. 8 weeks until it arrived. Costs: $33 including shipping.
« Last Edit: September 06, 2019, 12:01:43 pm by Pinkus »
 
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Online Fraser

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Re: ZnSe lenses on Ebay
« Reply #34 on: February 21, 2019, 12:09:34 am »
@Pinkus

Excellent work  :-+

I shall print your lens holder and use it myself  :) I just ordered the 25mm lens from the same sourc3 as you. I paid the extra $2 for standard postage. We shall see how long it takes to get to the UK.

I am going to use that same Kaji-Fi mount design for my lens mount adapters. Just need to find the time to get back on Sketchup.

Thanks for sharing your design here  :-+

Fraser
« Last Edit: February 21, 2019, 12:26:28 am by Fraser »
 

Online Fraser

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Re: ZnSe lenses on Ebay
« Reply #35 on: March 02, 2019, 12:41:00 pm »
The 25mm lens arrived with me in the UK from China today. 9 days for delivery. That is a pretty good transit time so it was well worth paying the extra £2 for ‘Standard’ shipping rather than ‘Economy’  :-+

Fraser
 

Offline richnormand

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Re: ZnSe lenses on Ebay
« Reply #36 on: March 02, 2019, 08:48:30 pm »
Different solutions for different people. 8)
I needed to look and take pix close up on a circuit board with my SeekThermal. I used a cheap eBay ZnSe (for 10um laser stuff) and a pool noodle (with a hole in the middle) for a friction fit to the camera.
Works perfect for my needs. :)

REPAIR, RENEW, REUSE, RECYCLE, REBUILD, REDUCE, REPURPOSE, RESTORE....
 

Offline Uho

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Re: ZnSe lenses on Ebay
« Reply #37 on: March 02, 2019, 09:07:03 pm »
I also thought that foam rubber holds the lens well. Result on the photo. Almost $ 50 in the trash. After that, I only make a good mount.
 
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Offline Gyro

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Re: ZnSe lenses on Ebay
« Reply #38 on: March 02, 2019, 09:30:14 pm »
Sad to see one end up like that.

My masking tape solution isn't much more secure. Luckily I rarely need to 'fit' it. Unfortunately the TG130 has no convenient mounting points.

https://www.eevblog.com/forum/thermal-imaging/flir-tg130-review/msg1388901/#msg1388901

« Last Edit: March 02, 2019, 09:35:21 pm by Gyro »
Chris

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Offline richnormand

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Re: ZnSe lenses on Ebay
« Reply #39 on: March 02, 2019, 09:30:35 pm »
Ouch!
Sorry to see that Uho. :'(

I guess I have been lucky up to now.  :)
Never had an issue over the years and it was also used several times by grad students. The fit is quite stout and the Seek camera lens baffle is slanted inwards towards the insides and the lens is the exact diameter of the baffle exit.
At the end the fit is quite strong. I have no doubt should I drop the assembly it could detach. Fortunately all the work I do is over a soft anti-static mat of the bench. (Keep fingers crossed).

But at the end of the day I should consider a proper adapter. This idea was initially a "quick one-of" a few years ago and since I am using it regularly I should make it good. (Inner voice... need to justify getting a 3D printer,,,)
« Last Edit: March 02, 2019, 09:36:28 pm by richnormand »
REPAIR, RENEW, REUSE, RECYCLE, REBUILD, REDUCE, REPURPOSE, RESTORE....
 

Online Fraser

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Re: ZnSe lenses on Ebay
« Reply #40 on: March 02, 2019, 10:16:28 pm »
Uho,

Nice mount  :-+

Fraser
 

Online KE5FX

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Re: ZnSe lenses on Ebay
« Reply #41 on: April 05, 2019, 05:55:07 am »
Recently, at the request of a friend from the thermal imaging forum made a universal holder for macro and body lenses under the FLIR E series. Holders macrolens for FLIR you can find several types of on the Internet. They are all United by the principle of fastening - due to friction. But it's not very reliable. When shaking the lens may fall out. They fight very easily, and the price is not small...

I just received one of these lens holders from Uho, and it's awesome.  Very well made.  It is now much easier to install and remove an external lens from my E4.  Highly recommended for anyone who is tired of messing around with tape.  :-+
 

Offline Uho

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Re: ZnSe lenses on Ebay
« Reply #42 on: April 05, 2019, 07:28:06 am »
Thanks for the feedback.  :)
 I was glad to help. If anyone needs holders please contact us.
 

Offline frogg

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Re: ZnSe lenses on Ebay
« Reply #43 on: August 02, 2019, 02:37:43 pm »
This is great info...

Out of curiosity, has anyone had any success with building a telephoto adapter using a pair of plano-convex lenses? Say a 4" FL front and 1" FL rear?
 

Offline Uho

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Re: ZnSe lenses on Ebay
« Reply #44 on: August 07, 2019, 08:48:40 pm »
I recently made a lens holder for euzer. This is a slightly modified macro lans holder for Flir E. I made a short video with English subtitles.

https://youtu.be/6_EUN7DSm9Y
 

Offline TE-V1

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Re: ZnSe lenses on Ebay
« Reply #45 on: August 16, 2019, 02:37:36 am »
I would watch eBay and any other sites for germanium lenses too. There are bargains now and again. I managed to snag a huge coated germanium close-up lens that fits snugly right into my rubber focus grip on my E40 for peanuts.
A picture and a price would go a long way as the concept of "huge germanium lenses" varies greatly from one person to the next and not least "I got it for peanuts" which also varies a lot from one to the next and difficult to put into perspective. 

--

I pick one of the ZNSe a few months back, it costed 8bucks (USD) delivered with a focal length listed at 50mm.

I get this level of makro from a budget-viewpoint.(Seek Pro FF iOS 290USD + 8USD ZnSe FL 50mm)



Item..





Assuming you have a thermal camera that has interchangeable lenses, then there are other ways to do thermal macros that don't require additional lens elements at all, reducing further losses.  For instance, simply moving your lens further away from the camera...In other words, using an extension ring, or even a macro bellows, between your thermal camera and the thermal lens.  My Thermal Expert TE-V1 has a Schneider 00 mount (M25 x 0.5mm), and I just discovered an M25 x 0.5mm to M42 adaptor on ebay for under £10 with free postage. 
This will allow me to fit my current Umicore 19mm f1.0 Thermal lens onto the front of my various old 35mm film format M42 extension tubes or my old macro bellows. The tricky bit is finding an adapter that allows the bellows to fit onto the camera...That's not so easy to obtain and I may have have to make a custom adaptor for the job.
 

Offline Uho

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Re: ZnSe lenses on Ebay
« Reply #46 on: August 17, 2019, 01:46:33 pm »
Hi! Many owners of thermal imagers ask which lens is best for macro. And still they buy the cheapest lenses. The photo is not the cheapest lenses. Usually they buy even cheaper. But I don’t buy them after the tests anymore. The difference in price is almost doubled. Image quality is also different. In the thermal range as well. On high-resolution thermal imagers, this is visible. If you need a good image you will have to buy a CVD lens.
I'm talking about lenses designed to work with a CO2 laser. I have Thorlabs optical lenses. This is a different level of image quality. The price is also an order of magnitude higher.
« Last Edit: August 17, 2019, 08:02:46 pm by Uho »
 

Offline Uho

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Re: ZnSe lenses on Ebay
« Reply #47 on: August 17, 2019, 08:19:03 pm »
In some cases, I use GE lenses. At the same focal length, distortions such as the fisheye effect are less than half. When compared with lenses  ZNSE.
 

Online Ultrapurple

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Re: ZnSe lenses on Ebay
« Reply #48 on: September 06, 2019, 11:48:06 am »
On the Therm-App Flickr group, Hagrid Rubeus has 3D printed a holder for a small ZnSe lens for the Therm-App camera.




No word yet on how well it works, the sensitivity or image quality, but there is a discussion starting about it here.
« Last Edit: September 06, 2019, 11:53:16 am by Ultrapurple »
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Offline meanie2

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Re: ZnSe lenses on Ebay
« Reply #49 on: September 29, 2019, 12:03:45 pm »
https://www.phonereco. com/macro-lens-for-seek-camera/






 


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