why not just buy the 2x since they are the same price?
1588419
The 2x is an excellent extender, however it does slow down the auto focus response of whichever lens it is attached to more than the 1.4x. I think the 1.4x allows for noticiably crisper images than the 2x with my 300mm f4.00 Canon lens, but the 2x does extend the range some of course. I have both extenders, but the 2.0 ends up sitting in my camera bag a lot more often that the 1.4. They are bothe excellent extenders, and make my excellent 300mm lens a very good 460mm lens and an above average 600mm lens in my opinion.
1588420
To J.D. who asked: "why not just buy the 2x since they are the same price?"There is at least two reasons: 1). 2x will degrade the sharpness significantly more then the 1.4x. So if 1.4 is enough, then it is better. 2). It will make the minimum appeature go down by 2 stops. So if you start with a 180mm F3.5 macro, you will end up with 360mm, F7.1. Many cameras can not focus beyond F5.6, so only manual focus at that point. It also becomes a much "darker" lens. Where as the 1.4x will only bring it down by 1 stop to about 260mm, F5.0.Good luck.
1588421
I purchased the 1.4X, after doing research on the results of both products. From what I read, the images stay "sharper" at the edges, with the 1.4x. I have used the 1.4X, and have been very pleased with the results. I do intend to purchase the 2x, understanding that the clarity may not be as good.
1588422
As noted by the other answers, most Canon DSLR bodies can't auto focus at f/8.0. The new Canon 7D Mark II can auto focus at f/8.0, at the center focus point (only). The other 64 focus points can focus at f/5.6 or lower.
1588423
I heard with the 2x you have to use manual focus and I am very happy with my 1.4.
1588424
Just a question using 1.4x on APS-C sensor, wondering how it relates to the maximum aperture allowed for auto focusing of 5.6. As I understand, if you have a lens set for f/4 then the effective max. aperture on APS-C sensor would be 4x1.6 = 6.4, now if you magnify it by the 1.4x extender then you get 6.4x1.4 = 9 This is the effective aperture on a cropped sensor using the extender, am I missing something here?
1588425
Because Canon dSLR cameras are unable to auto focus if the f-number is greater than f5.6. So, if you have a lens that's f4 and you use the 1.4 extender, then the result is f5.6 and auto focus still work. If you have the same lens that's f4 and you use the 2x extender, then the result is now f8 and auto focus will not work. The only time this is not true is if you're using the Canon 1DX camera body but since most people use the 5DMII or 5DMIII or the crop-sensor bodies, and lenses that typically have f4 in the lens (as do most Canon zooms), then the 1.4 extender is the best solution. I can say that on my 5DMII with my 300mm f4 L lens, the 1.4 extender is a perfect match (and it works perfectly with my 135mm f2 L lens as well).
1588426
The 1.4X III does much better in my Canon T3i with the Canon 70x200 1:4L IS USM III Lens. Picture SHARPNESS is not a problem.
1588427
Hi, Jason. You tend to see some degradation in image quality as well as some vignetting with the 2X teleconverters. While the canon is better than say a Sigma or a Tamron it will still affect image quality some. Using the 1.4X, at 200mm with the 70-200L, I have seen some very minor loss in sharpness in the corners, however I have to pixel peep to see that.
1588428
In my case AF speed is very important, also with the 2x the max apperture is 5.6 which will not blur too much the background, is slower and will lead to higher ISO's... But that's my requirements I have a baby boy and love to take pictures in low light as well as sports... If you are into bird photography or will always shoot with good light 2x is still a fine tool.
663162
I believe that you looked at pricing from two different distributors for the product. This is common. I would say that they are identical.
2015253
The two-pack is offered and sold by a different merchant, not Amazon. Amazon has a better price per unit, so just add as many single units as you need and save $ versus the multi-packs.
2079557
Sorry, but had to laugh, I was just thinking the same thing. Why in the world would you buy more than 1 if the price increases with each add on filter? Duh.. thanks for asking, I'll be waiting for answer, probably won't get one though. LOL!!
1058014
I'm looking at the same two as well. Any input would be appreciated.Thanks!
947705
Depends on the seller. If its the same product then go for the cheaper one.
1969734
I was thinking about that, because above all, the other one is cheaper... I dont know wich one to buy...
1657312
Clearly states on package that the XL is equivalent to up to 2.5 times the regular cartridge. I think it's worth the difference. I always buy XL when available. Shop often and you'll find you can catch a deal where 1 XL is cheaper than 2 regulars too! More details than that can be found on back of package. Look in Walmart or something and you can read it. Can't find image of back or side shot on here.
861497
It might be a matter of which seller is selling them. They are both the same.
1970536
I debated this myself. I guess there is a reason why they make both because sometimes you want the smaller one and sometimes the larger one. But what I like is they are both lightweight. So if you can only get one, keep this is mind as you make final decision.
14066
Buy the cheaper one, it's the same product. The difference might be that one product is aimed for the consumer market and the other at the commercial market.
1742121
we have been working with Amazon to take the 2X off because it is misleading. we are not sure why they have that up there because we do not offer 2 of them at this price
1633027
I have bought it both ways. I buy the single when they are out of the double and have good luck both ways. They are the same quality whether you buy one or two to a pack.
1538544
I noticed that as well. I suggest the lower price as products are identical.
1761142
The two are supposed to be the same. In fact it's the same company, just two brand names...Not sure why there's this price difference.
1403863
The only thing I can suggest is to check the weight and dimensions of the two and see. If they're the same, I'd say it's just the sort of price difference I notice in some products in Amazon that I can't explain... and I buy the cheaper. If different, it's likely in thickness, layers or length/width.
1287809
If you buy 1 at a time vs buying a pair together it shouldn't matter as long as they are the same model speaker.