Sony SEL20TC 2x Teleconverter Lens

Bought A7iv with 24-240 lens here and assumed that the teleconverters would give me a 480 tele. Thank heavens I read the Q&A here and used a fine toothed comb on the SONY site where the fine print reveals that the number of lenses compatible with the teleconverters are VERY LIMITED! A SONY rep Emailed me that my 24-240 was compatible which is not true. The lists of compatible lenses is not at all easy to find at SONY where even the compatible lenses are ALL listed with the footnote with some restrictions and none are listed as fully compatible, taking you to a list of compatible camera BODIES so I emphasize that the teleconverters must be compatible with the equipment in front of and behind. Some buyers scratched their lens trying to make the converter work on an ... MoreBought A7iv with 24-240 lens here and assumed that the teleconverters would give me a 480 tele. Thank heavens I read the Q&A here and used a fine toothed comb on the SONY site where the fine print reveals that the number of lenses compatible with the teleconverters are VERY LIMITED! A SONY rep Emailed me that my 24-240 was compatible which is not true. The lists of compatible lenses is not at all easy to find at SONY where even the compatible lenses are ALL listed with the footnote with some restrictions and none are listed as fully compatible, taking you to a list of compatible camera BODIES so I emphasize that the teleconverters must be compatible with the equipment in front of and behind. Some buyers scratched their lens trying to make the converter work on an incompatible lens. Caveats about the A7iv and SEL24240: very heavy (~3.5 lbs); maybe too sophisticated a camera for one who was previously familiar the A700; caught off guard by the resolution of the A7iv which is not fully appreciated in the Facebook and Instagram world where sensors the size found in phone cameras dominate. Standard enlargement of full frame images there yields fuzzy images whose detail is not appreciated until enlarged.... a lot. I will enjoy my new camera and lens eventually as I become a better photographer. I know, I know, the camera does not make the photographer. I'm staying with SONY and am becoming a smarter consumer.

I'm using a Sony a92 with the 70-200 Mark2 with the 2X. The camera functions that I use are:-Open to f5.6 (f2.8, other settings will work).-APC Mode (Custom button).-I then set another of my custom buttons to the Steady Shot Adjust. to Manual at 600mmBy doing that, I can switch between the long lens and my other lenses at the push of a button as I switch lenses.I use small or medium tracking; I'm getting sharp images at the equivalent of 600mm which can still be cropped if necessary.FWIW: I've found that it still focuses pretty well even on Wide or Zone for moving subjects. Combined with setting on Mode 3 on the lens, it does improve the hit ratio a bit more.I personally think that, for me; it's a pretty good investment.

I see that a lot of people in these reviews are using the 2x teleconverter along with their zoom lens. I am of the opinion that teleconverters should never be used with zoom lenses and were originally designed to be used with "prime lenses" which are those lenses that have a fixed focal length. Zoom lenses perform best in the original focal range that they were designed for. When using any extender not only are you loosing light but you can also exacerbate any form of flaw that the zoom lens may have that would not be otherwise apparent without an extender. Prime lenses are a lot more expensive but for good reason as their optics are usually the best that can be manufactured by any company at their particular focal length. Their low F stops are also important as it ... MoreI see that a lot of people in these reviews are using the 2x teleconverter along with their zoom lens. I am of the opinion that teleconverters should never be used with zoom lenses and were originally designed to be used with "prime lenses" which are those lenses that have a fixed focal length. Zoom lenses perform best in the original focal range that they were designed for. When using any extender not only are you loosing light but you can also exacerbate any form of flaw that the zoom lens may have that would not be otherwise apparent without an extender. Prime lenses are a lot more expensive but for good reason as their optics are usually the best that can be manufactured by any company at their particular focal length. Their low F stops are also important as it allows us to add teleconverters with out taking such a big hit on the light.That being said, I have purchased both the 1.4x and the 2x teleconverters for use with my Sony 400mm F/2.8 prime lens. I cannot say that I don't notice a difference in performance. The clarity is still awesome but there is a noticeable loss in the focusing speed and subject acquisition possibly due to less light hitting the sensor at a given F stop.I have found that Sony teleconverters work best with static or larger slow moving subjects. The 1.4X is still good for larger birds in flight such as owls but if you are photographing something like a swallow in flight your hit rate will have a noticeable drop.The 2x, although still sharp, is even more noticeably sluggish in focus acquisition and tracking of smaller fast moving subjects. So, in a nutshell, know your application and only get teleconverters if you think that they are worth the hit you are going to take on speed of focus, loss of light or possible softness you may run into while using a zoom lens.