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Carson MonoZoom ZM-721Carson Optical, Inc (CA)
  • Carson MonoZoom 7-21x21mm Zoom Monocular (ZM-721)
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Carson MonoZoom 7-21x21mm Zoom Monocular (ZM-721)

4.0 out of 5 stars 284 ratings
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Purchase options and add-ons

Brand Carson
Model name MonoZoom
Eyepiece lens description BAK4 Roof
Objective lens diameter 21 millimeters
Telescope mount description Altazimuth Mount
Product Dimensions 41D x 14W x 16H millimeters
Focus type Manual Focus
Power source Battery Powered
Finderscope Reflex
Item weight 73 g

About this item

  • Compact and Lightweight Monocular with Powerful Zoom Feature | Zoom Magnification Range: 7x-21x | Objective Lens Diameter: 21mm
  • Fully Coated Optics | BAK-4 Prisms | Eye Relief: 12. 5mm-9mm | Field of View: 120 - 252 ft. at 1, 000 yards
  • Included Accessories: Soft Pouch, Neck Strap and Lens Cover | Contains Retractable Eyecup and a Built-in Tripod Thread
  • Perfect Zoom Monocular for Sight-Seeing, Bird Watching, Hunting, Sporting Events, Wildlife Viewing, Concerts, Travel, Archery, Target Shooting, Climbing, Hiking and other Outdoor Adventures
  • Backed by Carson's No Fault, No Hassle
› See more product details

Frequently bought together

Carson MonoZoom 7-21x21mm Zoom Monocular (ZM-721)
This item: Carson MonoZoom 7-21x21mm Zoom Monocular (ZM-721)
$57.48
Get it by Wednesday, Aug 6
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Carson MiniMight 6x18mm Pocket Monocular with Carabiner Clip (MM-618)
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Product information

Technical Details

Department ‎mens
Manufacturer ‎Carson
Place of Business ‎RONKONKOMA, NY, 11779 US
Language ‎Swedish
Item model number ‎ZM-721
Product Dimensions ‎3.56 x 10.16 x 3.56 cm; 72.57 g
ASIN ‎B015MSDA60

Additional Information

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Carson MonoZoom 7-21x21mm Zoom Monocular (ZM-721)

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Product details

  • Language ‏ : ‎ Swedish
  • Product Dimensions ‏ : ‎ 3.56 x 10.16 x 3.56 cm; 72.57 g
  • Date First Available ‏ : ‎ Nov. 29 2019
  • Manufacturer ‏ : ‎ Carson
  • Place of Business ‏ : ‎ RONKONKOMA, NY, 11779 US
  • ASIN ‏ : ‎ B015MSDA60
  • Item model number ‏ : ‎ ZM-721
  • Country of origin ‏ : ‎ China
  • Department ‏ : ‎ mens
  • 鶹 Rank: #31,755 in Electronics (See Top 100 in Electronics)
  • Customer Reviews:
    4.0 out of 5 stars 284 ratings

Product description

The Carson MonoZoom 7-21x21mm Zoom Monocular (ZM-721) is a versatile, compact monocular with adjustable magnification, offering a zoom range from 7x to 21x for detailed, up-close views. Its 21mm objective lens provides bright, clear images, making it ideal for outdoor activities like bird watching, hiking, or sports events. The lightweight design and ergonomic grip ensure easy handling, while the zoom feature allows you to customize your field of view. Perfect for those seeking portability and performance in one.

Top Brand: Carson

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Carson MonoZoom 7-21x21mm Zoom Monocular (ZM-721)
Carson MonoZoom 7-21x21mm Zoom Monocular (ZM-721)
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Price$57.48$71.99-13%$13.99
Was: $15.99		$89.99$22.69$139.00
Delivery
Get it by Wednesday, Aug 6
Get it by Wednesday, Aug 6
Get it by Wednesday, Aug 6
Get it by Wednesday, Aug 6
Get it Aug 14 - 26
Get it by Thursday, Aug 7
Customer ratings
4.04.0 out of 5 stars284
3.93.9 out of 5 stars1,262
3.33.3 out of 5 stars79
4.04.0 out of 5 stars311
4.74.7 out of 5 stars4
4.44.4 out of 5 stars3,589
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Customer reviews

4 out of 5 stars
284 global ratings

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Very shallow depth of field & impossible to focus clearly beyond 7x magnification
2 out of 5 stars
Very shallow depth of field & impossible to focus clearly beyond 7x magnification
Even at 7X magnification, the DOF on this monocular is razor-thin, making focusing challenging. At higher magnifications, particularly at the maximum, it was in my experience impossible to correctly focus. The image attached was taken with a smartphone held up to the eyepiece; 7X magnification and you can already see elements of what I'm talking about. A small item that I think warrants mention is the fact that the neck lanyard attaches to the scope by being threaded and looped through a slot in the plastic screw that serves as a cover for the tripod hole. It seems like an unnecessary potential point of failure. There were a few pros, but not enough to compensate for the flaws above. The grey color (of both the case and the monocular) is less common than black, and easier not to misplace. That there is a tripod screw is an interesting addition, but at the performance limits of this model, I can't see why a tripod would be necessary, unless for personal reasons (e.g. disability, etc.,). The unit is fairly light. The ability to turn the focus and zoom wheels from both the top and bottom (i.e. open casing) was helpful, as they were stiff.
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Top reviews from Canada

  • Greg
    5.0 out of 5 stars Very solid build...
    Reviewed in Canada on August 30, 2021
    Verified Purchase
    Very solid build...

    Focus and zoom feature are accurate and easy to use. Clarity is very good, used in a normal lighting situation and brightness was not a problem.

    Came with only one lens cap and a case.

    Nice monocular!
    Helpful
     Report
  • babtras
    4.0 out of 5 stars Decent optic, feels cheap
    Reviewed in Canada on May 13, 2023
    Verified Purchase
    This monocular is pretty good once you figure it out. But it has a dollar-store feel to it because it is too light weight.
    Helpful
     Report
  • N/A
    3.0 out of 5 stars Champ de vision
    Reviewed in Canada on January 20, 2024
    Verified Purchase
    Champ de vision très petit.
    Helpful
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  • kareem
    1.0 out of 5 stars Waste of money .. 20$ Walmart binoculars are better
    Reviewed in Canada on July 9, 2023
    Verified Purchase
    This small monocular is ok but very narrow Lens and hard to focus at zoom not that great of clarity my Walmart 25$ binoculars have a much better clear and zoomed view
    Helpful
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  • Mr. Something
    2.0 out of 5 stars Very shallow depth of field & impossible to focus clearly beyond 7x magnification
    Reviewed in Canada on May 24, 2023
    Verified Purchase
    Even at 7X magnification, the DOF on this monocular is razor-thin, making focusing challenging. At higher magnifications, particularly at the maximum, it was in my experience impossible to correctly focus.

    The image attached was taken with a smartphone held up to the eyepiece; 7X magnification and you can already see elements of what I'm talking about.

    A small item that I think warrants mention is the fact that the neck lanyard attaches to the scope by being threaded and looped through a slot in the plastic screw that serves as a cover for the tripod hole. It seems like an unnecessary potential point of failure.

    There were a few pros, but not enough to compensate for the flaws above. The grey color (of both the case and the monocular) is less common than black, and easier not to misplace. That there is a tripod screw is an interesting addition, but at the performance limits of this model, I can't see why a tripod would be necessary, unless for personal reasons (e.g. disability, etc.,). The unit is fairly light. The ability to turn the focus and zoom wheels from both the top and bottom (i.e. open casing) was helpful, as they were stiff.
    Customer image
    Mr. Something
    2.0 out of 5 stars
    Very shallow depth of field & impossible to focus clearly beyond 7x magnification

    Reviewed in Canada on May 24, 2023
    Even at 7X magnification, the DOF on this monocular is razor-thin, making focusing challenging. At higher magnifications, particularly at the maximum, it was in my experience impossible to correctly focus.

    The image attached was taken with a smartphone held up to the eyepiece; 7X magnification and you can already see elements of what I'm talking about.

    A small item that I think warrants mention is the fact that the neck lanyard attaches to the scope by being threaded and looped through a slot in the plastic screw that serves as a cover for the tripod hole. It seems like an unnecessary potential point of failure.

    There were a few pros, but not enough to compensate for the flaws above. The grey color (of both the case and the monocular) is less common than black, and easier not to misplace. That there is a tripod screw is an interesting addition, but at the performance limits of this model, I can't see why a tripod would be necessary, unless for personal reasons (e.g. disability, etc.,). The unit is fairly light. The ability to turn the focus and zoom wheels from both the top and bottom (i.e. open casing) was helpful, as they were stiff.
    Images in this review
    Customer image
    2 people found this helpful
    Helpful
     Report
  • Ken
    3.0 out of 5 stars Dim and low quality image
    Reviewed in Canada on July 20, 2025
    Verified Purchase
    Too large a magnification for the aperture, so image is quite dim, even in full sunlight. Also image has poor definition.
    Helpful
     Report

Top reviews from other countries

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  • Cliente 鶹
    5.0 out of 5 stars Ottimo
    Reviewed in Italy on April 14, 2024
    Verified Purchase
    Miglior monocolo rapporto qualità prezzo che ho provato.
    In passato avuto il vortex 8x36 costato 5 volte tanto e un Orion zoom 8-30x42 costato il triplo.
    Confronto agli altri due molto più piccolo e leggero,parlando di ottica ovvio che gli altri abbiano qualcosa in più,soprattutto il vortex ma niente di così eclatante secondo me da giustificare il costo(di Carson ne compri 5 a quel prezzo).
    Detto questo consiglio a chi cerca questo prodotto a un prezzo molto accessibile.
    Customer image
    Cliente 鶹
    5.0 out of 5 stars
    Ottimo

    Reviewed in Italy on April 14, 2024
    Miglior monocolo rapporto qualità prezzo che ho provato.
    In passato avuto il vortex 8x36 costato 5 volte tanto e un Orion zoom 8-30x42 costato il triplo.
    Confronto agli altri due molto più piccolo e leggero,parlando di ottica ovvio che gli altri abbiano qualcosa in più,soprattutto il vortex ma niente di così eclatante secondo me da giustificare il costo(di Carson ne compri 5 a quel prezzo).
    Detto questo consiglio a chi cerca questo prodotto a un prezzo molto accessibile.
    Images in this review
    Customer imageCustomer imageCustomer imageCustomer image
    Report
  • A. S.
    5.0 out of 5 stars Für den Preis top
    Reviewed in Germany on July 8, 2022
    Verified Purchase
    Für den Preis überzeugt das kleine, leichte Monokular.
    Die Bildqualität ist wirklich erstaunlich. Es lässt sich vieles gut erkennen. Ein zu großer Zoom erschwert die Fokussierung. In der Dämmerung für uns nicht zu gebrauchen.
    Bei Tageslicht top und empfehlenswert!
    Report
  • kane
    5.0 out of 5 stars Just got it, 10/10
    Reviewed in Australia on October 13, 2022
    Verified Purchase
    After searching for days through fake adds falsely advertising 80x hand held monos (only to learn later that isn't even feasible) and having them delivered only to find out they're barely 6x, I was relieved to find some actual brands that delivered on what they say. It is a small device that actually zooms 21X. I read the other reviews and saw a few 1 stars claiming it didn't work properly or failed completely. Some claim it was too dark and to be honest, that is to be expected in a 21x21 monocular that should have an exit pupil diameter of about 1 mm.

    I was ready for it to be dark, however it simply exceeded all my expectations, especially for the price. It isn't even dark, I can still zoom to 21x even when tested in a poorly lit room. A brighter image that my old 10x25. This thing is also just as small (a bit shorter even) despite having the (supposedly) bulkier prism design that gives a better image quality (explains why it isn't a dark picture). It is built well and just works. I find it easy to adjust both the zoom and focus (read a review of someone complaining, like, it was either broken or that person hires someone to wipe their butt coz it is too much effort). Naturally you need to be careful when focusing on objects far away, but it is certainly achievable.

    The only let down in this package was perhaps the belt sheath. It isn't bad, but I prefer black, with molle and made of thicker nylon/cordura. I would rather them have spent that bit of money throwing in another lens cap or securing the one they had on there properly, but I knew this before I got it. Luckily for me i had ordered a sheath for my leatherman wave and it arrived on the same day. It fits perfectly in there too.

    They even managed to fit a tripod attachment onto this thing. I have seen scopes 10 times the price of this size leave that part out. It certainly isn't unwelcome given how shaky things can become at this level of zoom and allows you to use it on mini tripos for phone attachments as well. Sure, if you have a tripod you probably have a larger scope to use, but it is an option, it is nice to have options.
    Report
  • scribe
    5.0 out of 5 stars Surprisingly Powerful for Its Size
    Reviewed in the United States on July 9, 2025
    Verified Purchase
    This tiny monocular exceeded my expectations. Despite its small size, the clarity and range are impressive — I was able to see much farther than I anticipated. The build quality feels solid, and the price was very reasonable for the performance it delivers.

    Overall, I’m very pleased with the purchase. It’s a great compact option for casual spotting or travel without sacrificing too much on image quality.
    Report
  • Steve
    5.0 out of 5 stars Very nice pocket monocular at a great price.
    Reviewed in the United Kingdom on May 29, 2021
    Verified Purchase
    Arrived quickly and first impressions are that it’s well made. Focus ring is quite tight and a slight movement makes a big difference in getting it in focus and staying there~ it’s very sensitive. Zoom control is great although I don’t know how anyone can hand hold anything more powerful than this due to shake~ I guess a tripod is the answer but for me that kind of defeats the object of having a very small monocular to carry around. Vision is clear and has good clarity for the price~ don’t expect Leica quality or the same quality as your big bulky binoculars and you will be pleased with this.
    Report