optical magnification actually only about 2.5x

optical magnification actually only about 2.5x

Bresser junior 8854000 USB-Microscope (Electronics)

Customer Review

I too have bought the USB video microscope and was initially impressed by the ease of use and very good image quality. However, I was quickly disappointed when I tried to mikoskopieren an onion-Epdidermis or other mikrospopische objects. Very soon it turned to me then the question of how large the increase is actually.

In the item description, the microscope is advertised with 200x or 20x magnification. I then once photographed the millimeter scale of a ruler in the "200x" mode. To my surprise, two millimeter strokes easily fit horizontally in's field. More specifically, the horizontal field of view is 1.5 mm wide. According to the data, a 1/4 "CMOS chip (0.63 mm) is used. Thus, the actual optical magnification 1.5 / 0.63 = about 2.5x.

This surprised me especially because another reviewer has stated in its assessment, the increase was "visually".

Of course it can be argued that because of the relatively high pixel count and the large representation obtained on the computer screen a greater magnification. However, this depends on the screen size of the user and is ultimately only a scaling of the image similar to a digital zoom. However, the actual quality of the display depends mainly on the resolution. The resolution per pixel is in the very best case 1.5mm / 1280 pixels = 1,2μm. In my experience, is reached about half of this value on the basis of digital camera artifacts and the quality of the optics.

The poor rating I give also because the manufacturer avoids sent clear indication of the quality of the optics. So Does the technical data sheet neither the working distance (measured from me 20mm) nor the actual optical magnification. Thus, the marketing of the company. Bresser is not transparent and dishonest. In advertising, which is indeed normal but still very annoying for customers.

If you approach with realistic expectations of this product you can certainly have fun with it. Unfortunately, advertising and other reviews with incomplete or incorrect information arouse false hopes and lead to disappointment.

February 1
coil 100m Rank: 5/5
September 28
Bright illustrations Rank: 5/5
October 8
NICE! 1610 Rank: 5/5
May 26

Related Reviews

Actually only mediocre, but still very addictiveGem Spinner II (App) Heated area differs considerably from the specified size from (only about 50% of the lower bed are heated)Medisana HU 665 Wärmeunterbett (Personal Care) Only about 2 seconds Fire ClipsVirtual Fireplace TV (App) The cushion like my wife, it's only about 2 mm thick and 12 cm longRebotec Griffpolster for crutch, Accessories for canes and crutches (Personal Care) Alternative to the original battery, the Lumix DMC-G5 and G6 - but only about 50% of capacityBundle Star * Quality Battery for Panasonic DMW BLC12 E with 950mAh !! with Chip Info Intelligent battery system - 100% compatible "latest generation" - with remaining time display "for - Panasonic Lumix DMC FZ200 G5 (GH2 and G6 without remaining time display), etc. (electronics) Actually, only one updateMADDEN NFL 15 (video game) Actually, only advantages!Ozaki OC530PU O! Coat 0.3 Solid Ultra Thin Protective Case for Apple iPhone 5 / 5S purple (Wireless Phone Accessory) Instead of 80 only about 70 minutes of recording time!10 Maxell CD-RW blanks XL-II Music Digital Audio (Personal Computers) Very good value for money! / Actually only 4 1/2 stars because ewtl. Screws problem !!!HUDORA 14738 - Big Wheel GC 205, 205 mm roll (Toys) Good quality of the camera, but over WLAN (depending on local conditions) only about 15 mInstar weatherproof wireless network camera for outdoor use IN-2905 V2 (24 LED infrared night vision, IR cut filter, audio input / output) black (accessories) Good for small lawns - knife life only about 600 square metersEinhell Electric Lawn Mower BG-EM 1030 1000 watts, 30 cm cutting width, 3x cutting height adjustment, 28l collection box (tool) Optical 5Sterne, electric only 3 starsKaltner presents mood lighting LED candle 3D Laser Crystal Glass Block Heart BEST MAMI actually only due to the warranty extensionMiele Carefree box - 5-year warranty and 16 anthers HyClean G / N (household goods) only about 50% of our repairs were successful with itPattex superglue Plastix 2 g and 4 ml, PSA1C (tool) Actually only a ModSid Meier's Civilization: Beyond Earth (computer game) too expensive for the 16 roles (the sheet on converted actually only 12 rolls!) !!!Classic Bess toilet paper 3-ply, 16 rolls (Personal Care) yes good ben er foot it broke the 2nd day although this chair supports 150 kilos and I actually only 80Office chair - black - with adjustable heights - imitation leather and plastic