Telephoto + converter

**Lowell Goudge** · 05-11-2010, 05:39 AM

Originally posted by dadipentak

I have a 1000mm lens and 1.4x, 1.7x & 2x TCs and there are still things that are out of reach!

Save your money & get close.

even when you stack them all together, the moon is still 250,000 miles away

But you do raise a point

Image size = subject size x focal length / distance

getting closer is the best approach and also the cheapest,

When you consider some of the shots I posted/linked earlier, all but the whooping crane (big white bird) are full frame shots, where I was close enough to fill the entire sensor, or almost do so, with the subject (in each case the whole bird). The whooping crane is an exception, it is 10% of the area cropped out of my K10D somewhat proving your point that things can be out of reach regardless of focal length attached.

**dadipentak** · 05-11-2010, 07:24 AM

Originally posted by Lowell Goudge

getting closer is the best approach and also the cheapest,

To some extent it's a "Do as I say not as I do" sort of thing, I'm afraid but all of my good shots have been those where cropping was minimal. If I've learned one thing it's that filling the frame is essential to getting all the resolution your gear can deliver.

imtheguy · 05-11-2010, 08:14 AM

Originally posted by Skog

Thank you for all your answers

The DA * 300 + 1,7 TC seems the best choise so far. That would give me a 510mm f7,1 right? Good for some really good light situations I guess. But I can just use the 300mm alone in those days, and just accept that some will be out of reach

Close, the camera actually reads f/6.7 when the TC is mounted.

And I certainly agree with Lowell that this does not make it a bright light only combo. Heck the Bigma at 500mm wide open is f/6.3 and requires a little stopping down for best IQ.

05-11-2010, 05:39 AM	#16
Lowell Goudge Site Supporter Join Date: Jan 2007 Location: Toronto Photos: Gallery \| Albums Posts: 17,891	warning, Math Involved Originally posted by dadipentak I have a 1000mm lens and 1.4x, 1.7x & 2x TCs and there are still things that are out of reach! Save your money & get close. even when you stack them all together, the moon is still 250,000 miles away But you do raise a point Image size = subject size x focal length / distance getting closer is the best approach and also the cheapest, When you consider some of the shots I posted/linked earlier, all but the whooping crane (big white bird) are full frame shots, where I was close enough to fill the entire sensor, or almost do so, with the subject (in each case the whole bird). The whooping crane is an exception, it is 10% of the area cropped out of my K10D somewhat proving your point that things can be out of reach regardless of focal length attached.

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05-11-2010, 07:24 AM	#17
dadipentak Site Supporter Join Date: Jul 2008 Location: Baltimore, Maryland Photos: Gallery Posts: 11,590	Originally posted by Lowell Goudge getting closer is the best approach and also the cheapest, To some extent it's a "Do as I say not as I do" sort of thing, I'm afraid but all of my good shots have been those where cropping was minimal. If I've learned one thing it's that filling the frame is essential to getting all the resolution your gear can deliver.

05-11-2010, 08:14 AM	#18
imtheguy Site Supporter Join Date: Mar 2009 Location: Virginia Beach Photos: Gallery \| Albums Posts: 2,950	Originally posted by Skog Thank you for all your answers The DA * 300 + 1,7 TC seems the best choise so far. That would give me a 510mm f7,1 right? Good for some really good light situations I guess. But I can just use the 300mm alone in those days, and just accept that some will be out of reach Close, the camera actually reads f/6.7 when the TC is mounted. And I certainly agree with Lowell that this does not make it a bright light only combo. Heck the Bigma at 500mm wide open is f/6.3 and requires a little stopping down for best IQ.