[aslyfox]

I may be wrong, Allen, but I think Dave already has the 60-250 and 150-450, and was considering whether the HD 1.4x converter would be suitable. Unfortunately, it's not... I believe it vignettes considerably on FF....

wasn't sure so gave as much info as I knew

[clickclick]

I'm afraid I haven't, David, but I understand it vignettes quite badly The sooner Ricoh comes out with a FF TC, the better...

Thanks - that's what I was thinking, and that's a big part of what's had me eyeing the 1.7x.

The 1.7x looks pretty darn good in these, all things considered.

---------- Post added 02-28-18 at 09:44 AM ----------

wasn't sure so gave as much info as I knew

Yes, I do already have the 60-250 and the K-1, but thanks for all the info anyway. It may help others. I should have been perhaps more specific. I have been eyeing the 1.4x and 1.7x thinking that even though I use my K3II for most of my telephoto work, it would be nice to have a TC I could use on the K-1. And I also am very interested in a TC with my 150-450 on the K3II, so all of this is good info.

[normhead]

Thanks - that's what I was thinking, and that's a big part of what's had me eyeing the 1.7x.

The 1.7x looks pretty darn good in these, all things considered.

---------- Post added 02-28-18 at 09:44 AM ----------



Yes, I do already have the 60-250 and the K-1, but thanks for all the info anyway. It may help others. I should have been perhaps more specific. I have been eyeing the 1.4x and 1.7x thinking that even though I use my K3II for most of my telephoto work, it would be nice to have a TC I could use on the K-1. And I also am very interested in a TC with my 150-450 on the K3II, so all of this is good info.

For the K-1 the 1.7 is really your only choice, and it works well on the K-1.
My 1.4 has been relegated to APS-c only.

[clickclick]

Hi Norm. Thanks for the input. What do you think of the 1.7x coupled with the 150-450 versus cropping on the 150-450 without a TC?

[normhead]

I have no experience with the 150-450, so I'm a little at a loss. From what I've seen 150-450 images are excellent, the TC will increase resolution, there's resolution to spare when used with both the K-1 and K-3 sensors. In the same neighbourhood as my Tammy 300 2.8 with the 1.7 TC My A-400 ƒ5.6 really struggles with AF confirmation with the 1.7, it's really hit of miss, so I'd be a little hesitant to buy the lens thinking going that route without some hands on experience.

I'd buy the 150-450 for the AF at 450. Using the 1.7x kind of defeats the purpose of the lens, at least that's the way I see it. If I bought it I'd use the 1.4 on the K-3 with it, and the K-1 when I didn't need the reach of the K-3 + TC combo, but, it's only going to be 300 K-3 millimetres.

From using my A-400 ƒ5.6 where the focus confirmation works well with the 1.4 but not with the 1.7 I'd be hesitant. But I know I've seen others on the forum get good results from the A-400 and 1.7. But you are really up in an area of doubt, and you may have to be the pioneer should you decide to go that route.

The 150-450 on a K-1 gives you the same FoV of a 100-300 on a K-3. I'd use the K-3 instead of the teleconverter in a situation where I waned more reach. But then, I use the K-3 for almost all telephoto work. If you're going for the harder to get Hi-Res image that may not be part of an acceptable plan. My plan is usually set up with the 300and 1.7x for 510mm on the K-3. If the subject is too close, switch to the K-1.

[clickclick]

The 150-450 on a K-1 gives you the same FoV of a 100-300 on a K-3. I'd use the K-3 instead of the teleconverter in a situation where I waned more reach. But then, I use the K-3 for almost all telephoto work. If you're going for the harder to get Hi-Res image that may not be part of an acceptable plan. My plan is usually set up with the 300and 1.7x for 510mm on the K-3. If the subject is too close, switch to the K-1.

I think we're in very simliiar modes here. I pretty much use the 150-450 exclusively on my K3II. I did pick up the 60-250 for use on m K-1, and that was with the idea that while it's a reasonable range to use on the K-1, anything beyond what was in reach and filling the frame should be a switch to the K3II. The appeal of the 1.7x over the 1.4x is the potential to use it on the K-1 too. It's nice to have options. I know folks are pleased with the 150-450 and the 1.4x on crop bodies, but I don't think I've ever seen controlled test shots of that combo versus just cropping on the 150-450.

Who here has all the pieces to take this to the next level?

Wish I had a money tree. It would make it easier to just buy one of each and start testing.

[angelo9978]

I will test the 150-450 with and without the 1.7x I won't make promises on how controlled it is, but I'll do my best, and I'll choose a good lighting day lol.

[clickclick]

I will test the 150-450 with and without the 1.7x I won't make promises on how controlled it is, but I'll do my best, and I'll choose a good lighting day lol.

Thank you!

[normhead]

I will test the 150-450 with and without the 1.7x I won't make promises on how controlled it is, but I'll do my best, and I'll choose a good lighting day lol.

Walk the lens back until you can barely read the small print on a cereal box or something similar, go a little bit further so you can't read the lettering, put the 1.7x on and see if you can now read the lettering. Go back a little at a time until you can't read the lettering anymore. You'll then have the optimum range for using the TC.

[angelo9978]

Walk the lens back until you can barely read the small print on a cereal box or something similar, go a little bit further so you can't read the lettering, put the 1.7x on and see if you can now read the lettering. Go back a little at a time until you can't read the lettering anymore. You'll then have the optimum range for using the TC.

Thanks for the tip!