Alley in Pisa, Italy

by Lars Kotthoff

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5

They're red LEDs under the cover. I removed the cover from my 430 EX and whilst it works better (with all lenses, on account of producing a brighter, sharper grid pattern) the light is still red. Here's what it looks like without the cover: It's worth noting that you can in theory remove and replace the cover as necessary but I snapped one off the clips ...


4

I'm not party to any engineering details and haven't yet used the lens so this is purely speculation, however... The Canon 100-400 (a first party competitor) was originally released in 1998, it's likely that since then manufacturing methods and designs have improved considerably allowing Tamron to produce a lens of good quality for a lower price. Obviously ...


3

The short answer is yes, they are trustworthy but your question seems to be more orientated towards the 'should you go for the cheaper version' kind of area. In some cases, people would consider the Tamron/Sigma equivalent to be better, but that's subjective and can take into account many things such as build quality, features, price and of course picture ...


3

I have the Sigma 18-50 f2.8 (non-HSM, non-MACRO) Made in Japan and the Tamron 17-50 f2.8 (non-VC) Made in China, both copies are for Pentax K-mount. I would have to warn you about Tamron. The QC is very inconsistent and it really depends on whether you're lucky and get a sharp copy, or like me, who has a back-focusing copy with inconsistent edge ...


2

It won't make a lot of difference for casual useage. The Canon EF-S 18-135mm f/3.5-5.6 IS will probably give you better image quality between 18mm and 135mm in terms of geometric distortion, vignetting, etc. They're both about the same in terms of sharpness at common focal lengths and apertures. Obviously the Tamron 18-270mm f/3.5-6.3 Di II VC will give you ...


2

I am a Contax lenses user (on Olympus 4/3). Once you get the adapter ring, the usual way is to set the DSLR in aperture priority, step down the lens, focus and shoot. I have also tested my lenses on Canon. This is totally doable, however note that metering in Canon can be affected by the way you open your lens and may need a light compensation which depend ...


1

There's a focus limiting switch - so that when you're doing macro work, it won't hunt through the whole range. Look over the lens and find the switch and turn it off.


1

I have been able to try the Canon 2x III extender and Sigma 70-200/2.8OS combination and they do mount and autofocus on the Canon 70D and T5i. The resulting image quality, unfortunately, is beyond the scope of what I can test.


1

There are a few aspects to this question. Physical connection: will they mate up and connect to the camera and operate? Almost definitely, sometimes with some limitations (and occasionally with some extras: the Kenko teleconverters connect in with Canon lenses and allow them to autofocus at F8 instead of F5.6, although I found the actual use in the field ...


1

Hard to tell. Canon's 2x III teleconverter includes a rubber extension that fits in to the back side of a lens mounted on it. This is used to block out excess light (that would have been for the outside edges of the image) from making it in to the teleconverter. It also likely would not support full electronic control of a third party lens. To maintain ...


1

You can use online tools to compare both of these lenses as well as the very comparable Canon 100mm f/2.8 IS L USM lens. Here is a comparison of the following three lenses at DxOMark: Tamron SP 90mm F/2.8 Di MACRO 1:1 VC USD Canon Canon EF 100mm f/2.8 Macro USM Canon EF 100mm f/2.8L Macro IS USM As you can see based on that spec comparison, they are all ...


1

Any EF or EF-s mount lens will fit on the Canon 600D. Tamron, Sigma and several other manufacturers make lenses that are compatible with EF mount cameras and the 18-270 you are talking about should be compatible. That said, while I don't know much about the kit lens, the Tamron lens is a super, super long super-zoom. Going from 18mm to 270mm means massive ...


1

If you can get it with a Canon EF mount, then yes. (or EF-S, but as far as I know only Canon actually make EF-S lenses; even the 3rd-party lenses designed for crop sensors usually still have an EF mount).



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