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Description
Riester Penscope Ophthalmoscope 2.7v with Pouch - BlackProvided with four apertures, without red open filter. 40 to 0 to +40 focusing lenses for better resolution. With 2. 7 V vacuum lamp. Screw fitting for fast and secure attachment to the handle. Sturdy adjustment ring to turn the instrument head to the ideal position on the handle. Extremely impact resistant casing made of glass fibre reinforced plastic. Simple exchange of the lamp at the base of the instrument head. Apertures A varying amount of
- Provided with four apertures, without red open filter.
- -40 to 0 to +40 focusing lenses for better resolution.
- With 2.7 V vacuum lamp.
- Screw fitting for fast and secure attachment to the handle.
- Sturdy adjustment ring to turn the instrument head to the ideal position on the handle.
- Extremely impact resistant casing made of glass-fibre reinforced plastic.
- Simple exchange of the lamp at the base of the instrument head.
Apertures
A varying amount of apertures.
A varying amount of apertures.
Aperture rotation dial
Use this dial to scroll through the varying apertures.
Filter switch
Switch between two different filters.
Focus dial
Easy to use focus dial.
Eyebrow rest
An eyebrow rest for a comfortable experience.
Apertures
4 diferent apertures
More information: Using Ophthalmoscopes in Eye Examinations
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- Free Standard Shipping on $100+ Orders to the USA.
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4.6 ★★★★★
Based on 2395 reviews
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Product Reviews
★★★★★ 5
Great reference guide for all cybersecurity professionals
Format: Paperback
I have both the blue team manual and red team that I carry with me for work in cause I need quick reference.
No downsides to this book.
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Reviewed in the United States on September 5, 2022
★★★★★ 5
Excellent
Format: Paperback
Excellent
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Reviewed in the United States on July 7, 2025
★★★★★ 4
Its a book!
Format: Paperback
Obviously, comparable to RTFM, marketed as more geared to responders, or Windows domain admins with a small amount of Linux in their network. My review assumes you know what the book you are shopping for is, you have read or heard about the RTFM and this.
Awesome book, you'll likely find or be reminded of something very useful that you can use tomorrow based on flipping through it.
Good - What you'd expect, condensed, long listing of commands with brief descriptions. Network, firewall, registry, services, etc etc etc. Command based AV scanning and lots more. Lots of stuff is based on "Basic" commands included in powershell or windows cmd, additional tools sysinternals suite, some typical third party network command tools, as well a few references to less common tools.
Eh - Frighteningly short intros to some tools, but for brevity's sake seems necessary, I'd suggest readers try everything in a lab.
Bad - Many commands are described from a very basic idea gearing up to fairly complex, complete, long commands, with lots of big font and double spacing. Little to zero instruction is provided for some stuff, for example, the reg query commands, which you can read and see what they do or are for. Lots of lines go to nearly the exact same command (like firewall rules), I feel like they'ed be better if they had more context.
The font is bigger (than RTFM), I'd like it if the book made more use of tables, bolding and underlining, and italicizing do differentiate sections of text, along with a smaller font and no double-spacing. I feel like this just adds to the girth of the book.
All in all, great book, I definitely recommend it for network or domain admins and defenders.
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Reviewed in the United States on March 13, 2017
★★★★★ 5
It is in very good condition! Can't wait to get on and learn!
Format: Paperback
The Blue Team Field Manual came very fast in fact five days earlier then expected and it made me very happy! Not to mention that the book looks like it haven't even been used it was a little scratch and tiny dent on top cover but it is barely noticeable! Thank you so much! Will be coming back for some more books 📚
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Reviewed in the United States on June 1, 2023
★★★★★ 5
Crisp and Clean
Format: Paperback
This book does exactly what it promises. It's a super clean collection of tons of useful commands for any defend-focused team.
It's not going to teach you any lessons, really, which is what I was looking for when I opened it. At first I was disappointed, but as I got deeper in I realized what the book was and what it wasn't, and it just got better and better.
I wish there were more books of this kind. You don't have to write a dissertation in order to create something useful. Sometimes quick references are the best thing you can have.
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Reviewed in the United States on January 17, 2017