The Extended Service Protection becomes VOID in the following cases:
It is important to note that any Sigma extended warranty is valid only on purchases made by residents of the USA from an Authorized Sigma USA dealer.
It is our pleasure to offer added value in the form of extended warranty packages for most products purchased through Authorized Sigma USA Dealers. Thank you for purchasing a Sigma product, the premier choice for all your photographic equipment needs. Piece of mind knowing that SIGMA stands behind its customers and products! Sign in to Register your product Direct and automatic updates notifying you about new products, benefits, added value opportunities, upcoming technical advancements, and SIGMA and dealer events when you opt-in to the SIGMA E-newsletter. Register your new SIGMA product for insurance purposes in case it is lost or stolen. Anything deemed beyond normal use will void any and all warranties. When sending your SIGMA product in for warranty service, please be sure to include a copy of the original sales receipt as proof of purchase (the start date of your warranty). (Please read the Service Policy and refer to the warranty policy included with your product for more information). Your warranty period begins the day you purchase your SIGMA camera, lens and/or flash and runs for a period of four years total from that date.
I was sure that my Sigma DR-41 was made in 1982 since the serial number starts with E82 but since this Sigma DR-35’s serial number also starts with E82 and came with a receipt that proves that it was sold in September 1980 it must have been made that year, or earlier.All brand new SIGMA Products purchased from a USA authorized SIGMA dealers are covered for 4yr USA warranty against defects in manufacturing and workmanship only (SIGMA fp camera and Cine lenses come with only 1yr warranty). I like the highs and the overtones better in mine but still, this is an amazing sounding guitar that I thought long and hard about keeping for myself. I thought my Sigma DR-41 was loud and had a very punchy midrange but this Sigma is one step beyond, I guess because of the 3-piece back. There is something of that punchy mids and clear ringing highs in the Martin sound that these Japanese made Sigma’s have too, after all they were commissioned by C. I got it for my friend Wolf who just like me have gone from a pretty solid Gibson obsession to realise that perhaps that Martin sound is not that bad after all. I didn’t buy this for myself, I’m way too happy with my Sigma DR-41 at the moment and on top of that I’m actually trying to thin out my Japanese guitar collection. They are pretty hard to come by these early 1980’s Japan made Sigma’s and sometimes very expensive too, between 500-1500€ depending on the model. It’s a beautiful looking Martin D-35 copy with a 3-piece rosewood back. I finally managed to find another Japan made Sigma, this time a 1980 Sigma DR-35. The top answer covers the decoding of the letters very well. (also branded as: Pro-Optic Rokinon Bower).Descriptions by Lens FeaturesIf you know what feature you're looking for in a lens (cropped-frame designation ultrasonic motor, low-dispersion elements, image stabilization, etc.), and want to know what each of the brands call that feature, the following answers are organized by lens feature.
Such lenses tend to follow the most stringent quality guidelines, and often come with a price premium.Off-Brand LensesMost off-brand lens manufacturers make lenses that fit many types of bodies, including Canon, Nikon, etc. Descriptions by Lens Make Brand LensesAll major camera manufacturers offer their own line of lenses. The historical answer has been broken up into individual answers per lens brand, with links to each of the lens brand answers below. When looking at a lens name, there are a lot acronyms describing its features (often specific to the manufacturer).Examples, Nikon:Nikon AF-S DX 16-85mm VR f/3.5-5.6G IF-EDNikon AF-I 600mm f/4D IF-EDNikon AF-S VR Micro-NIKKOR 105mm f/2.8G IF-EDExamples, Canon:Canon EF 85mm f1.2L USM Mark IICanon 70-300mm f/4.5-f/5.6 DO ISExamples, Sigma:Sigma 150mm F2.8 EX APO DG HSM MacroSigma 70-200mm F2.8 EX DG OS HSMSigma 50-150mm F2.8 EX DC APO HSM IIHow do I decipher these lens codes from different manufacturers? Note: Because of the community-wiki nature of this question, this accepted answer became really long, and difficult to edit and keep current as lens designations evolved.
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