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5 Reviews
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2 of 2 people found the following review helpful
5.0 out of 5 stars Essential accessory, 19 Oct 2013
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This review is from: Sigma USB Dock Mount for Canon Lens (Electronics)
The dock has enabled me to adjust the focus on my Sigma 35mm f/1.4, which needed correction at longer focus distances. Your camera's autofocus micro-adjust function may be able to do the same thing but only at one focus distance, whereas the Sigma allows four different focus distances to be corrected individually.

On zoom lenses, it also allows different four different focal lengths to be corrected in addition to the four focus distances, making 16 combinations in total.

I have also updated my lens's firmware via the dock, although no information was given about what the firmware update was seeking to improve.

For the price, I think this is an essential accessory for any owner of one or more compatible Sigma lenses.
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5.0 out of 5 stars great product., 6 April 2014
By 
Saravanan Madhavan "sokai" (Dublin, Ireland) - See all my reviews
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This review is from: Sigma USB Dock Mount for Canon Lens (Electronics)
i bought this pared with sigma 35mm, just in-case, the lens already razor sharp, tried it with the supplied software and updated it via internet and updated the lens firmware through this device. delivery as usual simply the best from amazon.
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5.0 out of 5 stars The Must be tool if you own supported lenses!, 17 Dec 2013
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This review is from: Sigma USB Dock Mount for Canon Lens (Electronics)
This dock will update lens' firmware and allow you to perform MULTIPLE micro adjustments for prime lens (depending on focusing distance - close, medium and far)

Make sure you buy dock with appropriate mount!

Thank you Sigma.
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5.0 out of 5 stars Awsome, 31 Oct 2013
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This review is from: Sigma USB Dock Mount for Canon Lens (Electronics)
If you have one of Sigma's new lens range then you must have one of these docks. I am using it with the 120-300 sport, which is a sharp lens without the dock, and after processing the 16 point MFA values it is unbelievably sharp. If you don't tune your lens to your camera using this dock you are only getting a fraction of your money worth out of your Sigma lens.
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2 of 3 people found the following review helpful
4.0 out of 5 stars Firmware updates at home at good price, 30 Jan 2014
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This review is from: Sigma USB Dock Mount for Canon Lens (Electronics)
Title says it all. For now, the use of this dock is very limited. I only have the 35 1.4 Art and just updated the newest firmware. Since then I can't find any other practical use of this dock. The autofocus adjuster feature is not intuitive at all. I understand how it works, but don't have the nerves and time to deal with it. Basically you have to constantly attach and deattach the lens from the dock in order to mount it on the camera and check the results. Annoying is a small word. It could be great if there was some way of automatic adjusting... Or at least easier workflow.
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Sigma USB Dock Mount for Canon Lens
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