SigmaTC-2001 2x Teleconverter

must use a tripod and accept that auto focusing is not possible when used with long lenses

The only place you can get one, discontinued years ago andout of stock at Sigma and all it's dealers (who don't hold stocks anyway,they get them direct from sigma).Amazon is an absolute godsend in this regard: they actually have these in their warehouse.Does what it says on the tin, if you want one buy it while you can.See Sigma's site for compatibility.

Please note that this product does exactly does what it is meant to. It works great with all the Sigma lenses that i have.The problem is with the warranty. I have been informed by Sigma UK that the Convertor that i bought from Amazon is not a UK import and as such is not covered by the Sigma Extended Warranty program.I have done a bit of checking and discovered that my Convertor is in fact made for the German market.**Again this Convertor works great and there are no issues with funtionality**

Works nicely with my Sigma lens but shame it doesn't allow autofocus at all.

I recently bought a Tamron SP 150-600mm F/5-6.3 Di VC USD G1（Model A011）not G2After getting it, I've been researching if there are any 2x Tele converter works for it as Tamron officially saysTC-X20 2x Tele converter Lens works only for new model of the G2, not G1.Reviews of Tele converter of various companies often say the auto focus doesn’t work.So without expectation, I bought this Sigma 870101 TC-2001 2x Teleconverter for my Canon EOS RP.I just realized the auto focus actually works with Canon EOS RP + Canon Mount Adapter EF-EOS R + Tamron SP 150-600mm F/5-6.3 Di VC USD G1（Model A011）I don’t know how much accurately works under this condition. I have to test more with checking images of computer screen. But in my first impression it works OK.I also attached my another Tamron SP 70-300mm F/4-5.6 Di VC USD（Model A005）also works for the auto focus.I’m really happy with this Tele converter.

Bought this for my Nikon D850 and my 60-600mm Sigma lens , didn't work at all , no auto focus in any settings and pic quality ??? well you can take better photos with your mobile phone.Item returned and refund received in one week..

Well at 2x, my 600mm lens was now 1200mm. Yes I loose auto focus and several stops of light, and a tad of sharpness, but fits the need of what I bought it for. Recommended

This has added an extra dimension to my photography. Converter is well made and is reasonably priced compared to Canon. Works brilliantly with my canon 7d and Sigma 70-200 lens. Nice piece of kit. Arrived on time and well packaged. Thanks, Amazon.

excelente relacion calidad/precio

The teleconverter doubles the size of the object. It is best used on sunnier days. I don't see any loss of quality. Good to have

Un buon moltiplicatore per obiettivi sigma, rallenta leggermente la messa a fuoco ma è difetto di tutti i moltiplicatori 2XPreso di seconda mano con 100€ meno rispetto all'originale per ora non presenta nessun difetto.Soddisfatto

A veces tarda en enfocar, pierde luminosidad, pero es normal de 2'8 a 5'6, lo que no me gusta es que solo vale para el 70/200, para los demás objetivos no vale. Igual con adaptadores...

Résultats remarquables sur le Sigma 150-600 Sport + Nikon Z6, très peu de perte de qualité d'image. Et l'autofocus fonctionne malgré l'ouverture à 13, mais ça c'est dû au Z6.