dsmeltz Loc: Philadelphia

It was wrong because the question began “Has anyone compared an image taken with…” The question was has anyone done this. You can take any question from any OP and just flippantly say, “Don’t ask here, go find out for yourself somewhere else.” But if we start to do that, it renders the whole forum process pointless.

Davethehiker Loc: South West Pennsylvania

Like you, I have wondered the same thing. I'm not a Canon user but have some excellent lenses and did experiments to see what will work and what does not work.

I have found that:
1) 2X TC seldom help.
2) 1.4X TC can and does help.

3) It depends!
If your going to magnify through cropping you need both good glass and a lot of pixels to work with.

Both cropping and use of a 1.4X TC will work. You can do a bit of both but it's easy to over do.

I hope this helps. I agree you must experiment and see what works for you and your equipment.

joer Loc: Colorado/Illinois

Thanks Dave.

UtahBob Loc: Southern NJ

Here you go:

The issue with a 2x as we all know is that with the converter on we need to decrease the shutter speed, open up the lens, or increase the iso. Really the only viable option is to decrease the shutter speed for me but since you need a higher shutter speed to counteract the increase in the focal length and shake you have to start with a very high shutter speed without the converter. I only use the converter for static subjects because I can tripod it but with some of the better bodies now I wonder if the iso step up could be a viable alternative.

These were done at 1600 iso on a D7000 mirror up using a remote with around 3 seconds of settle. The exif shows f11 probably to get some dof at this range. This is at 500mm on the lens. I did some CA in LR5 on both but nothing else. The 2x image is a 100% crop from the original raw.

I think the 2x image is better although with some noise correction you might be able to remove some of the grain in the upsized image but that removes detail unless you are careful and I have not mastered that skill yet.

Any thoughts on the blurring on the 2x of the tanker markings? This was shot across a body of water in bright sunshine but also next to a road plus wind so I can't guarantee that there was no vibration or thermal off the water.

750mm upsized to 1500mm

(Download)

2x on a 500mm with 1.5 crop sensor

(Download)

Ka2azman Loc: Tucson, Az

I agree with you for the most part, BUT, (aren't there always a "but") sometimes a thought of like "do the test yourself" never came as a thought to the OP. It might seem crude on the surface, but I didn't see any rudeness in the reply to them.

One can find many answer in life of which many have given instruction to. I.e. "Easy to learn, easy to forget" "or "We learn off the shoulder of those who went before us." Both are valid, and yet (aka but) are almost the opposite of each other. The second says take an easy way, learn off others, the first says do the test for yourself. Which is correct?

Just maybe a spark came from "try it yourself". As you see here not, only was his answer here but others. The outcome is that the OP will pick and try what he deems necessary to fulfill his requested answer. What does that encompass, "test it himself" the answers he selected.

I'm not disagreeing with you, only pointing out it is a viable answer. The ones I am appalled with, are the rude and crude answers along with do it yourself.

oldtool2 Loc: South Jersey

I really do not want to get into the "do it yourself" discussion.

One of my favorite combinations is the 100-400mm lens with a Tamron 1.4X TC. It seams to work quite well for me. I use this on BIF but have found there can be some variables such as a bright day the TC works better than on an overcast day.

This is a loaded question! Too many variables, such as different cameras, different lenses, different weather conditions, ect... give different results.

Jim D

dsmeltz Loc: Philadelphia

This is what I would expect, since with the 2x you are still using the whole sensor. When you crop you are only using a limited part of the sensor.

antlertwo Loc: Ballston Spa, New York

I have found that cropping is better. I use both a 300 f4 and 80 - 200 2.8 nikon lens and a 1.4x with a d300s body. For me I would rather invest in a longer lens. Just my opinion.

Haydon

Take a look at how the user posts. Never has any positive interaction.

GoofyNewfie Loc: Kansas City

I have him/her/it on ignore though very occasionally there is a glimmer.

UtahBob Loc: Southern NJ

Now that I look at the posts almost all sound like they came from a fortune cookie. Un - fortunately, it's taken over this thread.

joer Loc: Colorado/Illinois

Thanks for the images. I agree the 2x is slightly better.

joer Loc: Colorado/Illinois

It make sense to me.

joer Loc: Colorado/Illinois

Thank you for the reply.

joer Loc: Colorado/Illinois

No doubt you are correct.