How do I choose between 24-70 f/4 and 24-105 f/4 Canon lens?

I am getting a new medium range zoom lens for general use and occasional weddings. This new 24-70 f4 was top of my list until I watched this review:

Canon 24-70 f/4 L IS vs Canon 24-105 f/4 L IS – Fight!

The guy, who owns the “L” lens (??? They’re both “L” lenses -ed.), complains that 24-105 f4 is a sharper lens and he claimed that there are other people who feel the same, but I couldn’t find any other reviews complaining about this lens sharpness.

I don’t want the spec of the lens which I already know but is there anyone here who actually owns those lenses and is happy with the quality of 24-70 f/4 over 24-105 f/4? i.e. is it worth paying extra for 24-70 f4 over much cheaper 24-105 f/4?

[Update]

I went with 24-70 f2.8 II and been very happy ever since.

How long is the range of Canon ST-E2 speedlite transmitter in practice?

I just ordered a used but working Canon ST-E2 speedlite transmitter because it was so cheap that it cost practically nothing. However, the ST-E2 hasn’t arrived yet. My flash has support for ST-E3-RT as well. My camera doesn’t have the “easy wireless” flash, meaning ST-E2 is necessary for this camera model.

How long is the range of a Canon ST-E2 transmitter in practice (not in optimal conditions)? I understand that it uses infrared. Is the infrared so powerful that it can bounce off walls indoors? How about outdoor shooting, does a ST-E2 work well outdoors?

Does ST-E2 require line of sight when shooting outdoors? If a flash is situated behind the camera in outdoor conditions, will it trigger? If not, is it possible to put some kind of reflector (umbrella?) in front of the camera but still outside the field of view to bounce infrared backwards?

At least my Canon flash has the sensor in the front, but fortunately the head turns 180 degrees, so I can always position the sensor in such a manner that it’s facing the camera.

The reason I’m wondering is that I ordered a new ST-E3-RT which is taking quite long to arrive (the shop where I ordered it from still doesn’t have the product, and it will take 2 weeks for them to have it in stock), before finding the used ST-E2. If it seems ST-E2 is enough for most conditions, I could cancel the ST-E3-RT order the cost of which is approximately 5 times the cost of a used ST-E2.

Apparently, professional photographers used infrared triggers for a long amount of time until Canon created a radio based system, so it can’t really be that bad, right?

As another benefit of ST-E2 apart from the price, it works with older Canon equipment, meaning I can order used flashes which are quite decently priced when compared to new Canon flashes. As third benefit, it saves 50 grams of weight compared to the radio model.

Compatible mobile instant image printers for Canon DSLRs

I’m looking forward to buying one of those neat mini instant images printers. Here’s a chart from this article comparing some of them. (At least) The Instax SP-1 and Kodak Mini 2 are missing. chart

I would like to print images directly from my Canon 70D to the printer, but I’m not sure if all of these support it. The 70D only has Wi-Fi, so no Bluetooth or NFC which rules out a few. But what about those with Wi-Fi? I was barely able to find anything on those that doesn’t involve Smartphone to printer only, just the Canon Selphy’s user manual shows instructions on how to send pictures directly from a DSLR. That one’s definitely too big to be considered “mobile” to me though.

So my question being: Which mobile instant images printers are compatible with Canon (DSLR) cameras that have no wireless connectivity other than Wi-Fi?

Will a 400mm lens on a Canon 7D help me get better detail of birds in flight than my Panasonic FZ1000?

I am using a Panasonic Lumix FZ1000 with a built in 25-400 lens for bird-in-flight photography. My pictures are coming out good with the FZ1000, I’m just not able to get the size and detail of far away fowl.

I am therefore looking to upgrade. Canon 400 mm f/5.6 is what was recommended with the EOS 7D by Tony Northrup as the best starter combo for bird photography, both used for about $ 1300 total. This is within my budget as I’m looking to keep my investment under $ 2000.

Will a Canon 7D with a 400 mm, or 100-400 since it has IS and I generally like to shoot hand held to catch birds in flight, provide me much of an upgrade? Also, would the max zoom be any different?

I’m also concerned with the 400 prime lens that I can find the birds as I usually have to zoom out on my 25-400 considerably to get the bird in my view finder before I can zoom in to shoot it.

Can a Speedlite 430EX II be used on a Canon EOS 6D?

I recently purchased a Canon EOS 6D, but my Speedlite 430EX II is not working with it. Is this flash not compatible with the 6D? When I go to Menu –> External Speedlite Control, flash firing is enabled.

However, when I press ‘Flash function settings’ or ‘Flash C.Fn settings,’ it says “This menu cannot be displayed. Incompatible flash or flash’s power is turned off.” (power is definitely not turned off :))

What is the issue?

Yongnuo Updated YN600EX-RT II Flash not linking with Canon 77D

I think I’ve done everything in the manual and instructional videos I’ve watched, but I can’t seem to get my new Yongnuo YN600EX-RT II flash to link up with my Canon 77D using the Easy Wireless setup. I want to use it as a wireless slave. Optical slave works fine, but the 10-18mm lens casts a shadow from the onboard flash. It also works fine onboard the camera.

I asked on an Amazon product page (I needed it soon!) and someone said it’s compatible, but Yonguo doesn’t list it in the product description. I love the 77D, but it seems like an outlier in Canon’s line.

Any ideas? I don’t want to buy a wireless trigger. This CNET video tells me I’m not misunderstanding the concept!

Here’s the back of the flash:

Back of the Yongnuo flash

And here’s the back of my 77D:

Back of the 77D