That’s what I am leaning toward. It looks like I can rent one for $38 for 7 days.
That has to be the way forward. Don't forget to tell us what you find.
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That’s what I am leaning toward. It looks like I can rent one for $38 for 7 days.
> IQ drops off significantly at longer subject distances eg > ~35m with 400 f2.8E FL + TC2 III. Cropping images taken with a TC is usually disappointing. It's worth testing your combo(s) on tripod and standard target to get to know the limitations.
This is true and a hard lesson learned for me personally. I shot a "budget" long reach option for years: the Pentax 24mp aps-c crop camera with the DA560mm f5.6 lens. The lens had some obvious drawbacks, like slow AF and poor correction of longitudinal CA and purple fringing, but I only realized how difficult it was to replicate the long distance performance of that combo, after I traded in the lens and began my attempt to replace 560mm f5.6 with Canon and Nikon.
I shoot a lot of wading birds at a large tidal area, and the first time I attempted the Canon 400DOII with the 1.4TC to replicate my familiar 560mm f5.6 lens, I was totally shocked at having spent so much only to find myself confronted with drastically worse performance over distance, although very dependant on the type of light. I cannot really communicate the shock of these first images at a familiar aperture/focal length combination in familiar light over familiar distances. I have since sold the Canon 400DOII, a superb lens at close to medium distances with the 1.4TC (in non-stressfull light) btw, and have multiple times been at the verge of re-purchasing the Pentax DA560, but that brand is fading so I did not.
Anyway, just some caution meant for those falling for the popular TC solution and finding it does not provide all the answers when it comes to increasing reach. I now shoot the Nikon 500PF on the D500, without TC use, rely on heavy cropping, and have made peace with the personal neccessity of investing in a 600mm prime. Fortunately, this only has to be done once....![]()
The only time I have used a teleconverter with the 500mm PF was when photographing jaguars from a boat where I used the TC-14 III and a monopod. I also used manual focus the entire time. Check your camera's manual and see how few AF sensors are enabled at f/8 and you will see why manual focusing often becomes necessary. This is also why so many people spend the money to buy heavy f/4 telephoto lenses and tripods and gimbal heads and haul them around. A 500mm f/4 is still a very usable 700mm f/5.6 in terms of the autofocus performance of most cameras.
You may be able to get adequate autofocus performance at f/8 with you Z7 camera in ideal conditions and with high contrast subjects of moderate size but then it comes down to how often you encounter these situations. For a motionless subject manual focus is an option and a TC and lens combination is less of a handicap.
Your comment about cropping being useful is in line with my own thinking and why I prefer the D850 most of the time. The D5 for example with a DX crop becomes a 8.9MP camera and the D2x provided much more resolution. To get the usable image size of a 500mm lens on the D850 I need a 600mm lens on the D5 camera. The Z7 provides similar advantages.
In terms of teleconverters the TC-17 is a waste of money and made sense in the days of ASA 160 film with the 1/2 stop gain over the TC-20, but not with digital cameras that provide ISO 6400. The III generation of Nikon teleconverters are noticeably sharper than the II versions. I saw this first hand with images taken with the TC-20 III being quite a bit sharper than ones taken with the TC-14 II using the same camera and the same lens.
I 2nd your comment, completely in agreement with your statement. I'll only add the same happens when I use TC 1.4 III in my 500mm PF 5.6 clear pics, focusing time a bit slower than my 300 mm f 2.8 VR III use the TC14 III with my 300mm PF and it works great. AF still locks on fast, very little if any loss of IQ. I also have the TC17 II and can't say the same about it. I rarely use it, the loss of IQ is noticeable, and AF doesn't work most of the time.
I ordered the Z 1.4 one to go with my 70-200/2.8 since all of the reviews say if you can stop down a stop it's essentially as good as without and wide open. Might consider the F mount 1.4 as well for my 500PF at some point if I get out of the DX bodies entirely…although if we see the Z90 or whatever the mirrorless D500 is I might keep that one for when I need lots of lens reach.I use the TC14 III with my 300mm PF and it works great. AF still locks on fast, very little if any loss of IQ. I also have the TC17 II and can't say the same about it. I rarely use it, the loss of IQ is noticeable, and AF doesn't work most of the time.
I have the 1.4, 1.7, and a 2 all version ll. I haven’t been pleased the with the results when used on my 500G. Eventually traded the 500G for the 600G. Haven’t tried teleconverter on the 600 yet. Normally shoot with a FF, found that if I need that little extra l’ll shoot with the D500. My wife has an older 300 2.8 af-s that she shoots with a 1.4 version ll that is just as sharp as with or without a teleconverter. But she did drop the combo with a D4 attached. All 3 pieces were returned to Nikon for repair with request to “marry” the 3 together, so that may explain why the set is so sharp.
My favorite combination for birding is the TC14E II with the older 300 f/4 AFS on my Z6 or Z7II. AF is outstanding even handheld. It does not work with the TC14E III version.