Two Teleconverter questions (Page 2): :sm24: :sm24: :sm24:...

Don, the 2nd son Loc: Crowded Florida

CHG_CANON wrote:

Your D750 will have difficulty with autofocus for ... (show quote)

Cdouthitt Loc: Traverse City, MI

Imho, 600mm is about the max usable focal length with your current setup (ff). To get more usable reach, you’re looking at spending $$$$ to get a prime lens that’s faster and works properly with 1.7 and/or 2x teleconverters.

mrtaxi Loc: Old Westbury NY, Fort Lauderdale, FL

If your reach for water birds is too short at 600 mm at f6.3 a teleconverter will do you no good. A 1.4x converter will reduce the light to about f8, your autofocus will not work, your ISO will need to be set too high for good IQ or the shitter speed open too long for good IQ without blur. The sad truth is that you need a realy expensive fixed focal length lense, of as high a mm as you can afford. A 500 or 600 or 800mm. Theses work way better with teleconverters because their f stop is often between 2.8 to 4.0. and besides better optics the key is they let in more light. Borrow or rent one and you will see the difference.

trinhqthuan Loc: gaithersburg

Ben's nana wrote:

I have a Nikon D750 and a Tamron 150-600 lens. I'm looking to purchase a teleconverter in order to get closer view of birds.

1. Do I choose a teleconverter based on the lens (Tamron) or camera (nikon), or does it matter?
2. Should I limit it to 1.4x teleconverter in regards to minimizing loss of image quality?

Personal experience/reviews welcome

Fran

To get AF at f8, should limit to 1.4x/ Most budget lenses have f 5.6 (1.4x 5.6 = 7.84).

doclrb

Ben's nana wrote:

I have a Nikon D750 and a Tamron 150-600 lens. I'm... (show quote)

Ben's nana Loc: Chesterland, Ohio

Thanks to everyone for your responses. I am, unfortunately, more undecided now than I was when I started looking at teleconverters. Ugh! I'll have to give it some more thought
Fran

cjc2 Loc: Hellertown PA

It's always best to match the TC to the lens. That said, the 150-600 is not a good candidate for any TC. Best of luck.

tracs101 Loc: Huntington NY

Cdouthitt wrote:

And getting closer by foot isn’t an option?

It’s already an f6.3 at 600mm, so you’re going to need even more light with an f1.4 attached to it.

Good point.

radiojohn

My info is old, old, old. Check the number of elements in the converter and if each side of each element is coated. Cheap converters had 3 elements, better ones had 5. The more coated surfaces the better. I can't speak to the electronics. 1.5x were better than 2x...3x and above (!) were garbage.

jackpinoh Loc: Kettering, OH 45419

Ben's nana wrote:

I have a Nikon D750 and a Tamron 150-600 lens. I'm looking to purchase a teleconverter in order to get closer view of birds.

1. Do I choose a teleconverter based on the lens (Tamron) or camera (nikon), or does it matter?
2. Should I limit it to 1.4x teleconverter in regards to minimizing loss of image quality?

Personal experience/reviews welcome

Fran

The teleconverter should be from the lens manufacturer. The manufacturer designs the TC to work with their lenses, not some other manufacturer's lenses.

All teleconverters reduce sharpness. Expect a 10% loss in sharpness for a 1.4TC and 30% or more loss for a 2.0TC.

jackpinoh Loc: Kettering, OH 45419

jackpinoh wrote:

The teleconverter should be from the lens manufacturer. The manufacturer designs the TC to work with their lenses, not some other manufacturer's lenses. The manufacturer's web site should tell you what lenses their TCs are compatible with. If not, call their product support number and ask.

All teleconverters reduce sharpness. Expect a 10% loss in sharpness for a 1.4TC and 30% or more loss for a 2.0TC.

juanbalv Loc: Los Angeles / Hawthorne

armandoluiz wrote:

... And there we go again 🤣🤣🤣🤣🤣 br br I have... (show quote)

Bultaco Loc: Aiken, SC

Walk on up.

joer Loc: Colorado/Illinois

Ben's nana wrote:

I have a Nikon D750 and a Tamron 150-600 lens. I'm looking to purchase a teleconverter in order to get closer view of birds.

1. Do I choose a teleconverter based on the lens (Tamron) or camera (nikon), or does it matter?
2. Should I limit it to 1.4x teleconverter in regards to minimizing loss of image quality?

Personal experience/reviews welcome

Fran

Don't waste your time putting a TC on this lens. You'll get a larger subject, lower quality, and loose autofocus at the higher end. It will focus slower and hunt at the lower end. You are better off just cropping.

Kozan Loc: Trenton Tennessee

I bought a TC for my Nikon lenses. The TC did not work on any of them. Had to send it back to B & H for a refund. Seems the Nikon lenses have a protuding lens element which interfered with the TC. The TC was a Tamron or Tokina. I don't remember which brand.

I have since bought the Tamron X1.4 for my Tamron 70-200 Di USD G2 lens. It works much better than I thought it would. So I would check out the manual for any TC you are thinking of getting BEFORE you buy. A lens compatibility chart should be enclosed with it.

Kozan