Entomologist's magnifying glass + lamp

I'm just thinking about introducing magnifying glasses, which are attached to glasses and the like, to the lepstora range. If someone has tried it and can respond as such an option, please also unsubscribe...

I use a head-mounted magnifying glass similar to these links (I didn't find exactly my own model on the web - there are a lot of options):
http://www.mbs10.ru/Lupa_81001-3Led.html
http://salon-prof.ru/product_info.php?products_id=973
My model has the ability to insert two lenses with different magnifications at the same time and combine its multiplicity. I like it, it is convenient when spreading small beetles.

This post was edited by Dmitrich - 16.09.2013 18: 10

It may be strange, but as many people know, I am bespectacled (mild myopia -3). I walk around with glasses, sit at the computer, watch TV, catch fish, etc. But I always drive without glasses: I can't wear them in any way. And it doesn't depend on your points (I've already changed a lot of points). I wonder how this business is friends with Lupa? Does anyone have the same problem?

Today I looked at different magnifying glasses-lamps. 3-5 diopters, 12-19 cm, lamp and LED. I wanted to see 8 diopters, but there were none. The choice was small, we still need to look.
A little technical data:
Aperture 3 diopters, corresponds to an increase of x1. 75, focal length(it is also the optimal working one) 28.9 cm;
5 diopters - x2. 25.20 cm,
8 diopters-x3. 12.5 cm.

The first feeling is this.
All lamps have strong distortions and chromatic aberrations at the edges, so a more or less normal image is only in the middle of the lens

3 diopters is comfortable, but useless. To achieve the maximum magnification of x1. 75, you need to place the subject at a distance of 28.9 cm from the magnifier, the distance to the eyes should also be about this or slightly less.
This lamp turned out to be 19x15. 75 cm in diameter, so you could look both through the porthole and slightly to the sides.
Very good review. It feels like looking at a fish in an aquarium, i.e. slightly enlarged.

I have a distance from the eyes to the surface of the table about 42-44 cm, if you do not hunch over. Accordingly, the magnifier will be at a distance of 10-15 cm from the face, which is not good. In general, it is not convenient and of little use, but it is pleasant to the eyes.

5 diopters (x2.25) was quite enough, so 8, I think, is too much.
These lamps were only 12.7 cm in diameter. As a result, the image was severely distorted. If the diameter were larger, it would be just right.

The caps of most lamps are loose and do not hold, which is not convenient at all.
Most of the lamp-lit loupes had blown-out bulbs, which is what the user expects.
However, lamps with LEDs do not provide replacement in case of burnout, unless you master the soldering iron.

Wide ring lamps are not convenient, narrow ones are more attractive.

My verdict is this: You need to look for a magnifier of 5 diopters (just about 20 + 20 = 40 cm from the object to the eyes), 19x15. 75 cm in diameter, with 1 or 2 thin lamps totaling 22W or more. The clamp must be completely steel, without plastic adapters. The magnifier cover must snap elastically when opened.

There are similar models on sale.

This post was edited by Seneka - 17.09.2013 14: 57

It may be strange, but as many people know, I am bespectacled (mild myopia -3). I walk around with glasses, sit at the computer, watch TV, catch fish, etc. But I always drive without glasses: I can't wear them in any way. And it doesn't depend on your points (I've already changed a lot of points). I wonder how this business is friends with Lupa? Does anyone have the same problem?

Vasya I am the same bespectacled (-2,5), I straighten and mount them also removing my glasses, I straighten small beetles through a microscope, I can do large ones anyway. I use magnifiers only in emergency situations, in the field.

And it is difficult for me to spread out too small ones because I have a slight hyperopia. At close range, there is no clarity, and at a long distance, the object is too small to see details. I do without glasses, but I work at the computer at a long distance, at least 50 cm. So without a magnifying glass, I won't have any luck. Pun intended, though.

This post was edited by Seneka - 16.09.2013 21: 41

It may be strange, but as many people know, I am bespectacled (mild myopia -3). I walk around with glasses, sit at the computer, watch TV, catch fish, etc. But I always drive without glasses: I can't wear them in any way. And it doesn't depend on your points (I've already changed a lot of points). I wonder how this business is friends with Lupa? Does anyone have the same problem?

I have almost the same shortsightedness. But as I got older, I started using my glasses only for a distance - I read, work at the computer, and spread insects exclusively without glasses. Moreover," in the fields " I now wear glasses only on a string, so that I can quickly throw them on my chest: only without them can I, for example, view a piece of torn bark or disassemble the contents of a net when mowing.
P. S. But I watch TV with glasses.

Nearsightedness, which is what myopia is all about, so it's not surprising that the nearsighted straighten out without glasses, and the farsighted look at the hawks in the sky with the naked eye. But with small things, of course, it is more convenient to work under magnification, even if it is short-sighted.

I use a head-mounted magnifying glass similar to these links (I didn't find exactly my own model on the web - there are a lot of options):
http://www.mbs10.ru/Lupa_81001-3Led.html
http://salon-prof.ru/product_info.php?products_id=973
My model has the ability to insert two lenses with different magnifications at the same time and combine its multiplicity. I like it, it is convenient when spreading small beetles.

I fully agree with Dmitry. I have the same one, with interchangeable lenses. I really like it! I do all the small chores around the house with her, not just the beetles.
I advise everyone.

I fully agree with Dmitry. I have the same one, with interchangeable lenses. I really like it! I do all the small chores around the house with her, not just the beetles.
I advise everyone.

Do these glasses have plastic lenses?

Do these glasses have plastic lenses?

Yes, plastic ones.

And the eyes/head in this snap, no one, by any chance, does not start to hurt? Convenient, no words, but 10 minutes, and.....

And the eyes/head in this snap, no one, by any chance, does not start to hurt? Convenient, no words, but 10 minutes, and .....

At me-do not hurt. Moreover, during operation, the "snap-in" can not be removed: lenses like the visor of a knight's helmet rise up.

At me-do not hurt. Moreover, during operation, the "snap-in" can not be removed: the lenses like the visor of a knight's helmet rise up.

I know that they are rising, and I am sure that it is just the same in the lenses, not in the mount. In the wrong distance from the eye and/or to the object...?

Thank you for your feedback, Dmitrich!

This post was edited by Alexander73-05/28/2014 13: 19

I'm sure it's just the lenses, not the mount. In the wrong distance from the eye and/or to the object...?

Everything, of course, is individual.

Today I looked at different ones magnifying lamp. 3-5 diopters, 12-19 cm, lamp and LED. I wanted to see 8 diopters, but there were none. The choice was small, we still need to look.
A little technical data:
Aperture 3 diopters, corresponds to an increase of x1. 75, focal length(it is also the optimal working one) 28.9 cm;
5 diopters - x2. 25.20 cm,
8 diopters-x3. 12.5 cm.

The first feeling is this.
All lamps have strong distortions and chromatic aberrations at the edges, so a more or less normal image is only in the middle of the lens

3 diopters is comfortable, but useless. To achieve the maximum magnification of x1. 75, you need to place the subject at a distance of 28.9 cm from the magnifier, the distance to the eyes should also be about this or slightly less.
This lamp turned out to be 19x15. 75 cm in diameter, so you could look both through the porthole and slightly to the sides.
Very good review. It feels like looking at a fish in an aquarium, i.e. slightly enlarged.

I have a distance from the eyes to the surface of the table about 42-44 cm, if you do not hunch over. Accordingly, the magnifier will be at a distance of 10-15 cm from the face, which is not good. In general, it is not convenient and of little use, but it is pleasant to the eyes.

5 diopters (x2.25) was quite enough, so 8, I think, is too much.
These lamps were only 12.7 cm in diameter. As a result, the image was severely distorted. If the diameter were larger, it would be just right.

The caps of most lamps are loose and do not hold, which is not convenient at all.
Most of the lamp-lit loupes had blown-out bulbs, which is what the user expects.
However, lamps with LEDs do not provide replacement in case of burnout, unless you master the soldering iron.

Wide ring lamps are not convenient, narrow ones are more attractive.

My verdict is this: You need to look for a magnifier of 5 diopters (just about 20 + 20 = 40 cm from the object to the eyes), 19x15. 75 cm in diameter, with 1 or 2 thin lamps totaling 22W or more. The clamp must be completely steel, without plastic adapters. The magnifier cover must snap elastically when opened.

There are similar models on sale.

Yes, you are right 5 diopters is the most convenient to use.

If you have poor eyesight, I advise you to do it first. I have nearsightedness, I wanted to prescribe glasses for myself, so I went to a clinic in Novosibirsk https://excimerclinic.ru/myopia/orthokeratology/ there I was prescribed night lenses for the treatment of myopia, thanks to them I don't need glasses or lenses during the day, this method is very suitable for me, so I advise you to turn to them.

Better a late response than no response at all. Maybe someone else will need it. So, for the purposes of the vehicle, no "magnifying lamp"is definitely suitable. Because a magnification of 5x or more is required, a single lens of this multiplicity will have to be brought a couple of centimeters closer to the object in order to get a clear image of it. Naturally, any analysis and straightening of the material with such a small working distance is out of the question. Those who suffer from severe farsightedness can probably use the weaker magnifiers that are usually used for soldering, but only for very rough work, to put insects in jars, for example. A person with normal vision can easily cope with this task without any optical devices.

But to straighten millimeter riders, a much more sophisticated optical system is required, based on a Galileo tube or a Kepler tube with a wrapping prism - only in this way can you achieve both a large magnification and a large working distance. The best option is a binocular stereoscope (MBS or a foreign analog). However, their prices bite - they are very popular with soldering iron workers. Used-shnye usually found on sale only in a completely killed state. But if you do not use stereoscopicity for a similar purpose, you can use a simpler option. The TM itself is unlikely to be found in the market, but I hope that the principle of manufacturing its analog from any monocular and macro-nozzle is clear without additional explanations. I made a 7X50 MP2 and an Industriara-55U, the working distance of 11.5 cm allows you to use any tools without any problems. The field of vision is larger than that of the MBS-1. Plus, there is an iris aperture that allows you to adjust the depth of field - there is no such feature in binoculars. The disadvantage is only for one eye, making a stereoscope out of binoculars in this way, so that it focuses on one point, is not a trivial task. Although I once saw an industrially manufactured stereomicroscope using this scheme, I don't remember the name.

The message was edited INO-27.10.2022 00: 01