SKU: 65857723392

HKM-428819 30mm F4 Mini Guide Scope for Auto Guiding Cameras - Adjustable Focus and Dovetail Mount

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Description

HKM-428819 30mm F4 Mini Guide Scope for Auto Guiding Cameras - Adjustable Focus and Dovetail MountIntroducing the HKM 428819 30mm F4 Mini Guide Scope, designed for those passionate about stargazing and astrophotography. This compact and versatile guide scope is specifically crafted for use with auto guiding cameras, making it an essential tool for enthusiasts and professionals alike. With a lens diameter of 30mm and a focal length of 120mm, this guide scope features a high quality FMC coating that enhances light transmission for clear and crisp

Introducing the HKM-428819 30mm F4 Mini Guide Scope, designed for those passionate about stargazing and astrophotography. This compact and versatile guide scope is specifically crafted for use with auto guiding cameras, making it an essential tool for enthusiasts and professionals alike.

With a lens diameter of 30mm and a focal length of 120mm, this guide scope features a high-quality FMC coating that enhances light transmission for clear and crisp images. The design seamlessly supports sensitive automatic guiding cameras, ensuring you can easily locate and lock onto guide stars.

The precise helical focus adjustment, complete with a thumbscrew locking ring, allows you to make fine-tuned adjustments on the fly. This feature is particularly useful for achieving optimal focus, ensuring that you get the good possible results when capturing those stunning celestial images.

Constructed from a durable aluminum profile, the HKM-428819 is built to withstand the rigors of outdoor use. Its dimensions of 92x56x78mm make it both compact and lightweight, weighing just 342g (12.06oz). The guide scope also includes a dovetail mount compatible with both 1.25-inch and M42 mounting interfaces, making it adaptable for various setups.

The package comes with everything you need to get started, including a two-ring bracket with a dovetail, nylon-tipped thumbscrews, a tool for assembly, a dust cover, and a lens cover to protect your optics when not in use.

Whether you're a beginner looking to explore the night sky or an experienced astrophotographer seeking to enhance your tracking capabilities, the HKM-428819 30mm F4 Mini Guide Scope is a reliable choice that combines functionality with portability. Get ready to take your astrophotography to the next level with this innovative guide scope.

Product description
1. SVBONY Compact Ultra-mini Star Finder for auto-guided camcorders
2. Compact 4.4-inch mini waveguide mirror with 30mm f / 4 aperture optics
3. Support sensitive automatic guidance camera, easy to obtain guide star
4. With finger screw locking ring precise screw focus adjustment function
5. Designed for automatic guidance cameras such as Orion ZWO QYH (1.25 inch or M42 mounting interface)


Specification:
Model: SV165
Lens diameter: 30mm
Focal length: 120mm
Coating: FMC
Support port: 1.25-inch or M42 * 0.75 for camera installation
Focalizer type: Front focalizer
Rear focus: Adjustable
Dovetails with 1/4 inch screw holes
Pipe travel: 45 mm
Surface technology: sandblasting oxidation
Material: Aluminum profile
Net weight: 342g / 0.75lb / 12.06oz
Body size: 92x56x78mm / 3.62x2.20x3.07in


Features:

1.Compact Ultra-Mini Guide Scope For Auto Guiding Cameras2.Compact 4.4Mini Guide Scope With 30Mm F/4 Aperture Optics 3.Support Sensitive Auto Guiding Cameras For Easy Guide Star Acquisition4.Features Precise Helical Focus Adjustment With Thumbscrew Lock RingDesigned For Use With The Orion Zwo Qyh And So On Auto Guiding Cameras (1.25In Or M42 Mount Interface)


Specification:

1.Brand: -2.Model: Sv1653.Lens Diameter: 30 Mm4.Focal Length: 120 Mm5.Coated: Fmc6.Support Interface: 1.25In Or M42*0.75 Mount Camera7.Focuser Type: Front Part Focuser8.Back Focus: Adjustable9.Dovetail Includes 1/4 Screw Hole10.Tube Travel: 45 Mm11.Surface Technology: Sandblasting Oxidation12.Material: Aluminum Profile13.Net Weight: 342G / 0.75Lb / 12.06Oz14.Body Size: 92X56x78mm / 3.62X2.20X3.07 In


Packing list:

30Mm F/4 Mini Guide Scope1Xtwo-Ring Bracket With A Dovetail 1Xtwo Nylon-Tipped Thumbscrews1Xone Screws Tool1Xone Dust Cover1Xone Lens Cover



Shipping Notes
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Exchange/Return Notes
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SKU: 65857723392

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4.7 ★★★★★
Based on 17 reviews
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Product Reviews
V
Vincent Wu
Bozeman, US
★★★★★ 5
Great blanket for keeping cool, but doesn't magically defy physics.
Size: King（103“*90”）, Color: Luxury Grey
This blanket is pretty awesome, and functions exactly as stated; however you might get the wrong impression from the image of the blanket in a the snowy mountains glowing blue as if its actively cooling. The blanket has two sides, the "cold" and "normal" side -- the cold side is the one that has the Q-max 0.45 effect, it actually feels cool to the touch. That being said, covering yourself with this blanket feels pretty similar to using a down blanket with a silk (or some cooler) fabric. It feels quite cool initially but eventually your body puts out enough heat and it "runs out" of cooling. Although this blanket doesn't magically actively generate cooling, its quite effective because it operates fundamentally differently from most blankets. Most blankets are engineered to keep you warm by trapping heat in; this blanket is explicitly designed to draw heat away from your body. As such, it is extremely effective if you use a fan or run the AC, because your body heat is drawn away from the top surface and the inner surface can "grab" and remove more heat. As you probably know, air is a great insulator so this blanket has to be making contact with your body to achieve the cooling effect. If you are familiar with the way "Under Armor" works, I believe this blanket uses a similar principle to keep you cool. This blanket is quite light weight and comfortable, with a very silky (polyester) feeling outer surface. I have not owned this for a year yet, but I'm quite confident that this blanket would be suitable for winter (in Southern California); except if you live in a snowy region. 5/5 for a somewhat high tech blanket that keeps you cool; its the best in cooling you can get without resorting to "active" cooled blankets such as ones with water circulation.
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Reviewed in the United States on May 5, 2026
A
Amazon Customer
Omaha, US
★★★★★ 5
Fascinating product.
Size: Twin（90“ * 67”）, Color: Luxury Grey
It is a nightly struggle. My wife is a hot sleeper. I am not. It’s resulted in more than one argument. One of us is usually left shivering or sweating. So when Amazon offered to send me this cooling blanket, I thought I would give it a try. I’m really glad that I did. This item arrived well packaged and in good condition. It is lightweight and made of a polyester type material. The stitching is strong. The first test was the washing machine. We washed it with cold water on the gentle cycle. We then line dried it. It held up fine. We have a king size bed, but I decided to get a twin sized blanket. I put a warm blanket on my side of the bed and the cooling blanket on her side of the bed. It worked brilliantly. I don’t know what the science is buying these blankets, but it really does lower your body temperature. The moment that you open the package and feel the blanket, you’ll realize that it has some sort of cooling gel inside of it or something that draws heat away from you. Suffice it to say that our first night with this product was one of the best nights sleep that both of us had. If you have a problem like this, I would definitely recommend this blanket as a viable solution. In terms of value, I understand that this is not cheap; however, ask yourself what the value is of a good nights sleep. Overall, I’m very pleased with the quality, design, and functionality of the cooling blanket. I would definitely recommend it.
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Reviewed in the United States on May 5, 2026
C
Customer Review
Bozeman, US
★★★★★ 5
Cooler than my thinner blankets
Size: Queen (90" * 90"）, Color: Luxury Grey
This is a really nice cooling blanket—silky, soft, and comfortable. I actually tried it on a cold day (classic flip flip Rocky Mountain weather where it swings from 90° to 30° overnight), and it was absolutely freezing, lol. On warmer days, I can clearly tell that it's cooler than even my thinner blankets. My husband tends to sleep hot, and this works great for him. I run cold; it can feel a bit too cool initially, but that fades after a few minutes and stays comfortable. I also have two cats and was worried they’d snag it right away. We keep their nails trimmed, but they’re still cats. So far (about a week in), no snags or pulls—but I’ll update if that changes since that’s a big factor for me. At almost $100, it’s definitely not cheap for a blanket. I think it makes the most sense if you’re a hot sleeper or deal with night sweats—then the cooling effect feels more worth it. If you tend to run cold, it might feel like overkill unless you specifically want something for summer. Overall good value for a nice quality cooling blanket.
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Reviewed in the United States on May 4, 2026
A
Amazon Reviewer 💖
Fort Morgan, US
★★★★★ 5
Surprisingly strong cooling effect and really comfortable
Size: Queen (90" * 90"）, Color: Luxury Grey, Size: Queen (90" * 90"）, Color: Luxury Grey
This comforter honestly impressed me more than I expected. The cooling effect is very noticeable right away. Like actually noticeable, not just one of those things brands say. When you first touch it, it feels cool to the skin and that feeling sticks around instead of fading instantly. I’ve been using it at night and it definitely helps with overheating. I tend to get cery hot when I sleep, also I’m pregnant right now so that makes it even worse, and this has made a difference. It feels lightweight but still cozy enough that it doesn’t feel like you’re just using a thin sheet. The fabric is really soft and smooth, also it lays nicely on the bed without feeling stiff or bulky. It gives that clean, almost silky feel without being slippery. One thing to keep in mind is it’s not a super thick comforter, but i will say there is some heft to it. Like if i wrap myself around in it, it has some weight to it. Overall, I’m really happy with it. It actually does what it claims with the cooling, and it’s comfortable enough for everyday use. Great option if you’re a hot sleeper or just want something lighter and refreshing at night.
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Reviewed in the United States on April 22, 2026
M
mnvikings
West Palm Beach, US
★★★★★ 5
I love this comforter! It is so silky soft, feels so nice to sleep under.
Size: King（103“*90”）, Color: Luxury Grey, Size: King（103“*90”）, Color: Luxury Grey
I absolutely love this comforter! It is super lightweight and has a very silky soft shell on both sides. It feels so good to sleep under! Ever since I have been using it, I haven't been waking up in sweat covered sheets. It constantly has a cool feel to it 24/7. It is large enough that it fits my king size bed pretty good. It doesn't hang far over the edges, but it fits. It is dual sided, so you can have a light gray look on one side and a dark gray look on the other side, depending on what fits your decor better. I definitely recommend getting if you are on the lookout for a cooling comforter, especially because of the silky soft feel.
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Reviewed in the United States on May 11, 2026

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