Does it come with instructions for attaching it?

No, but i can help a little bit. This objective is known as a finite objective so you'll have to position it 160mm from the camera sensor. The other type of objective is a infinite objective which requires a 200mm lens to focus known as a tube lens. You'll need an RMS adapter, mine is a RMS to M42 for example lots on ebay. Then you'll need an M42 to whatever your camera mount is. You'll need some kind of extension tubes to around 160mm between the objective and the cameras sensor. Theres probably a little line on the camera body somewhere to show that Theres lots more info about this kind of thing here: http://extreme-macro.co.uk/

Does the objective lens come with a container for it?

Yes a normal objective plastic threaded sleeve

Can I lower the magnification to 2 times rather than 4 or would I need to buy a different lens for that?

Yes you can. You need to shorten the overall distance from lens to sensor but yes you can. A set of bellows really helps with this.

Will this fit an old b&l dynazoom. i want to lessen the magnification from the 10x to 4x?

Look at your 10x lens. To fit three things should match: the optical design must match - if you see an infinity symbol on your 10x lens -- the lens do NOT match. Next the the focal length must match, if you see 170/ on you 10x lens - your microscope is RMS, it can work - but requires an adapter - not worth it . If ups see 160/ it is OK, and also the third thing - the thread - most likely will match as well.

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AmScope 4X Plan Achromatic Objective Lens with Knurled Ring

Product ID: 36936874

Details

Brand
AmScope
Color
Gold Grey
Light Source Type
LED
Magnification Maximum
4 x
Material
Glass
Number of Items
1

🎯Plan Achromatic Color & Field Correction

🔬4X Magnification Power

⚙️Standard 160mm Tube Length

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223 zł

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Sold byAmazon PolandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔬 Elevate Every Detail — See Science Like Never Before

PLAN FIELD CORRECTION - Edge-to-edge clarity ensures your entire field of view stays in perfect focus—no compromises.
ACHROMATIC COLOR CORRECTION - Experience true-to-life colors with minimized chromatic aberration for flawless imaging.
DURABLE KNURLED RING DESIGN - Enhanced grip for quick, confident lens changes during critical lab moments.
CRYSTAL CLEAR 4 X MAGNIFICATION - Zoom into precision with sharp, detailed views that elevate your research game.
UNIVERSAL DIN JIS COMPATIBILITY - Fits seamlessly with most compound microscopes, making upgrades effortless and stylish.

The AmScope 4X Plan Achromatic Objective Lens is a precision-engineered microscope accessory designed for DIN/JIS standard compound microscopes. Featuring 4X magnification, achromatic color correction, and plan field correction, it delivers sharp, true-color images across the entire field of view. With a 160mm tube length and durable knurled ring for easy handling, this lens is a must-have for professionals seeking reliable, high-quality microscopy performance.

Specifications

ASIN	B01G4CCGRC
Best Sellers Rank	#9 in Microscope Lenses
Brand	AmScope
Color	Gold, Grey
Customer Reviews	4.4 4.4 out of 5 stars (114)
Enclosure Material	Glass
Light Source Type	LED
Magnification Maximum	4 x
Manufacturer	United Scope, LLC
Manufacturer Part Number	PA4XK-V300
Model Number	PA4XK-V300
Objective Lens Description	Achromatic
Power Source	Battery Powered
Real Angle Of View	45 Degrees
UPC	840979106385
Unit Count	1.0 Count

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