This was posted 2 years 11 months 19 days ago, and might be an out-dated deal.

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[eBay Plus] Viltrox EF to EF-M 0.71x Speed Booster $164.93 Delivered @ Wellsome eBay

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PLUSNF4

Original Coupon Deal

This is a multi-layered deal. This speed booster is the lowest price I've seen so far. Can be stacked with giftcards and code PLUSNF4 to bring the price down from $172 down to $165 for eBay Plus members.

If you have grabbed one of ~$680 Canon M50 cameras from the Amazon deal, or if you already shoot on the EF-M range, and you have some EF mount glass then this speed booster is a great way to get the most out of it.

For those who are unaware, a crop sensor Canon camera uses full frame lenses inefficiently, whereby the focal range and aperture should be multiplied by 1.6.

For example, a Canon EF 50mm f/1.8 on an EF-M camera behaves more like an an 80mm at f/2.9.

To combat this, we can use a 0.71 x speed booster, which brings that 80mm f/2.9 back down to a 57mm f/2.0.

Coupling the ~$680 Canon M50 deal with this ~$170 speed booster leaves you with a versatile $850 camera set up that can go from lightweight consumer photography to portraiture and low light performance approaching that of a $1500 Canon RP.

It also means you can invest in cheap crop sensor lenses for when you don't care about low light performance or bokeh (eg I use an EF-M 11-22mm for long landscapes on a tripod) but you can also invest in some of the expensive full frame lenses for when you need them (e.g. 135mm f/2.0 for portraits). Savings that could add up to thousands if you have a few zooms and a prime or two.

Bargain?

Edits: Tidying up grammar and spelling errors.

For anyone wanting a real world look, or before you argue with me, check out this video:

https://youtu.be/K3GMzqfiRqc

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closed Comments

  • I'd also love to see the work of other photographers on here if you want to reply with your gram or portfolio in this comment thread.

    (@mods hope this is allowed)

    • Will this work on my Canon 77D?

      • +1

        No, as the 77D is EF-S, not EF-M. The lack of mirror in the mirrorless EF-M range means that there's space to put this speed-booster. Therefore there are no EF to EF-S speed booster, unfortunately.

  • Price in title plz

    • +1

      Thanks, I'm still new :)

  • +3

    a crop sensor Canon camera uses full frame lenses inefficiently, whereby the focal range and aperture should be multiplied by 1.6.

    I'm not sure this is correct. The crop factor only applies to the field of view and depth of field. Light intensity doesn't change. Therefore the lens is equivalent to 80mm f/1.8 on FF.

    The Viltrox should make the EF 50mm f/1.8 equivalent to an 57mm f/1.3 optic.

    • f/1.3 in light gathering ability, but f/2.0 in terms of the bokeh you would expect at full frame equivalent focal length.

      I.e. 50*1.6=80mm. If you were to put a native 80mm on full frame it would have more bokeh than a 50mm on a crop with the effective focal range of 80mm due to the distance between the camera and the subject.

      But yes, good point noting that it actually increases low light performance, I was only telling half the story in regards to aperture. That's actually why this is called a "speed booster" at all.

      All the more reason this is a bargain!

      • -2

        'more bokeh' makes absolutely no sense.

        • Yes, it does 😑

          • @[Deactivated]: Boke is an aesthetic qualitiy, it comes in good and bad, coarse and not so coarse. Reviewing the linked video I believe the deviced gives more coarse bokeh as described by wikipedia. To my eye the images with the device appear soft compared to those without. This is desired by some.

            • @sceptical: Yes, you can get more or less coarse and different shaping and such, but I did not mean "more bokeh" to equate to ,"better bokeh", rather I meant that the speed booster results in a shallower depth of field thus more out of focus area thus more prevalence of the quality of that out of focus area, i.e. more bokeh.

              I feel like you might be pointing out semantics, as if I said "more flavour" and you have replied with "flavour is a quality of taste", or are you saying that less out of focus area results in equally prevalent bokeh? If so, I'm confused as to how.

              As for the softness, more glass usually leads to softer images as it interferes with the light. That being said, it's an amount that someone who chose an EF-M over an RF mount camera will unlikely care about.

              • @[Deactivated]: I understand what you are saying. My information is for those that may not realise that you are using fstops as a measure for boke within a single lens design, rather than over all designs.

                f2.0 on lens design A = f2.0 on lens design B

                Boke on Lens design A at f2.0 is not equal to Boke on Lens design B at f2.0

                Using your food analogue of "more flavour" works well. Double concentration of stock (measurable) will give more flavour (not so easily measured) for a single soup design (chicken). Double concentration of stock in a beef broth is also measurable, but gives a completly differnet flavour. The soup flavours are obviously lens designs, the concentration of stock, the aperture.

                And soft isn't bad :-)

  • Hoping we see some mft - ef deals soon, still need to eventually get one

    • What do you shoot on?

      • Blackmagic pcc4k. I mainly use manual lenses with dumb adaptors but ive got a few native lenses. Still to have access and the gained fov from ef would be great to work with

  • Seems expensive.

    • Are you being sarcastic?

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