Extension tube set does not affect image quality as there is no optics inside. increase ISO, decrease shutter speed;.
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Macro Extension Tube Adapter Ring Set For Nikon D7100 D7000 D5300 D5200 D5100 D5000 D3200 D3100 D3000 D700 D90 D80 DSLR Camera
Aliexpress UK
For Nikon 1 mount J1 J2 J3 V1 Cam. - This automatic macro Extension Tube Set is designed to enable a lens to focus closer than its normal set minimum focusing distance. Getting closer has the effect of magnifying your subject (making it appear larger in the viewfinder and in your pictures).
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m65-m65x1mm 6/8/17/27/30/36/58mm Macro Extension Tube ring Adapte For 65mm Screw Mount Digital SLR Camera Lens
Aliexpress UK
Nikon D3500, D3400, D3300, D3200, D3100, D3000. This macro extension tube set can be transform your lens into a macro lens. Extension tube set does not affect image quality as there is no optics inside.
eBay
m65-m65 36-90 Mount Focusing Helicoid Ring Adapter M65 to M65 36mm-90mm Macro Extension Tube for camera
Aliexpress UK
This macro extension tube set can be transform your lens into a macro lens. The set is consist of three tubes of different length, which can be used in any combination or individually to obtain the different magnification.
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M52-m52x1mm 7mm+14mm+28mm Macro Extension Tube adapter ring For 52mm mount camera LENS
Aliexpress UK
Features: Adopts high quality metal material, lightweight, sturdy and durable 3 rings make 7 different combinations, which extends the lens focal length for close-up shot, and won't alter the optical quality to ensure there is no glare in image Provides images with better quality than close-up filter, a good substitution to expensive macro lenses for macro photography Electronic contacts keep the light metering and auto focusing function of camera Good accessory for photography lovers .
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Meike Auto Focus Macro Extension Tube Ring for Sony E-Mount A6300 A6500 A6000 A7 A7II A7III A7SII NEX-7 NEX-6 NEX5R NEX-3N NEX-5
Aliexpress UK
M42 MACRO EXTENSION RING TUBE SET FOR M42 SCREW MOUNT. This is an M42 Macro Extension Ring Tube Set. 1x M42 Macro Extension Tube SET. Use this set with your normal lens and you will get the quality, which is as good as the original lens and the size, sharpness and versatility is perfect for the macro and close-up pictures.
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Macro Extension Tube Ring Adapter For M42 / Canon EOS / Nikon AI / SONY AF / NEX / Pentax PK / Olympus OM Pansonic Micro M4/3
Aliexpress UK
Extension tube set does not affect image quality as there is no optics inside. increase ISO, decrease shutter speed;.
eBay
Meike Auto Focus Macro Extension Tube Ring for Sony E-Mount /for M4/3 Mount A6300 A6000 A7 A7II A7III NEX-7 NEX-6 NEX-5 GH5 GH4
Aliexpress UK
Provides images with better quality than close-up filter, a good substitution to expensive macro lenses for macro photography. 3 rings make 7 different combinations, which extends the lens focal length for close-up shot, and won't alter the optical quality to ensure there is no glare in image.
eBay
Meike N-AF-B Auto Focus Macro Extension Tube Set 12 20 36mm Adapter Ring For Nikon D3100 D5000 All DSLR AF AF-S DX Camera Lens
Aliexpress UK