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Messages - Jon Gilchrist

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Third Party Manufacturers / Re: Samyang 650-1300mm
« on: April 14, 2014, 03:49:34 PM »
I've got the 650-1300 and the 2x converter that goes with it.  All in all, it's mostly a novelty. I picked it up used for somewhere under US$175 and for that price it can be fun to play with and the size certainly attracts attention. But if you want quality photos, this isn't going to give them to you. It needs an extremely stable tripod. Like, made of 12 tons of granite. It is highly susceptible to temperature based focus shifts. Everything makes the image jiggle. If you use it to shoot the moon, you will have to focus constantly because it will focus past the moon and apparently the DOF at moon distance is less than the diameter of the moon.  But it is pretty amazing to be able to take recognizable pictures of things that you can barely see with the naked eye.

Here's the Golden Dome at Notre Dame University from 4 miles away (along with a bunch of sensor dirt) at 2600mm on a 60D:

Same shot, but with a 70mm:

And here's the moon at 2600mm:

I think if it were possible to stop it down a couple stops it might have acceptable sharpness.  But you can't, and it doesn't.

How many of the 250 million have you owned? I'm at 5, which is something like .0000002% (decimal may be off).

Landscape / Re: Shooting comet Ison and picking a body
« on: November 20, 2013, 11:22:50 AM »
Went out this morning with both bodies, but couldn't see the comet.   :(

Might try again tomorrow.

Landscape / Shooting comet Ison and picking a body
« on: November 18, 2013, 08:18:47 PM »
I plan on heading out one of these early mornings to shoot comet Ison. And I'm looking for some opinions or experience. I've got a 6D and a 60D. The 6 has way better high ISO, but the 60 has a finer pixel pitch. Which do you suppose would be better for shooting the comet?

EOS Bodies / Re: Patent: A Pellicle Mirror by Canon
« on: October 31, 2013, 10:23:35 AM »
One big advantage of a fixed mirror system is that you can get a much higher frame rate while being able to see the subject during exposure. So maybe 20+ fps with no mirror blackouts, less vibration, and improved durability. If I were a sports shooter, this would be huge.

Canon General / Re: Help design a time lapse rig
« on: August 28, 2013, 01:45:42 AM »
You could do most of this with LEGO Mindstorms.

EOS Bodies / Re: Canon is going to add mid format
« on: August 13, 2013, 03:14:05 PM »
Perhaps they will purchase the Pentax MF products. That would give them an established product to start with, along with non-European manufacturing. And considering that the Pentax is discontinued, they could probably pick it up for a song.

Third Party Manufacturers / Re: First pic of Sigma 24-70 F/2 posted
« on: August 01, 2013, 11:43:52 AM »

There's no *might* about that.

This thing will be a pickle jar.  I currently have a bet going with a friend.  He seems to think this beast will be under two pounds.   That money is as good as mine.

- A

Considering the 35/1.4 weighs nearly a pound and a half, I think you're pretty safe.

Canon General / Re: Canon Camera Sales Down in Q2, Imaging Revenue Up
« on: July 27, 2013, 11:21:59 AM »
Maybe if they had something I wanted to buy. There hasn't been anything new and available in the higher end crop body market in 3 years. I have two 60Ds that need replacing, but there's nothing to replace them with.

So does this mean I should sell my Sigma 35/1.4 and get the 18-35 1.8?

Lenses / Re: What's your oldest Canon EF lens?
« on: July 22, 2013, 07:38:06 PM »
I have a 50/1.8 Mk 1 with a date code UB0200, so that's February of 1987. Pristine condition.

It's for sale if anyone is interested.

+1 Mine is also UB0200. It looks even more pristine, if that's possible, than yours.

Looking at the picture perhaps "pristine" isn't the right word for my lens.  Considering the thing is 26 years old and was not stored as a museum piece, it's in pretty amazing condition. There are a couple minor scuff marks and there is evidence on the contacts that it has actually been mounted on a camera.  It's still in better shape than my 2-year old 24-105.  I doubt there are many Mk2 plastic fantastic versions still surviving after 20+ years.

Lenses / Re: What's your oldest Canon EF lens?
« on: July 22, 2013, 09:30:10 AM »
I have a 50/1.8 Mk 1 with a date code UB0200, so that's February of 1987. Pristine condition.

It's for sale if anyone is interested.

Lenses / Re: 50 F1.4 durabilty question
« on: July 08, 2013, 08:30:09 AM »
If you google it you will find lots of reports of the 50/1.4 having focus system failures.  I've had it happen to me too.  Best bet is to put a hood on it and never take it off, and never let anything exert any kind of pressure on the inner focusing barrel.  Treat that lens like fragile crystal.

If you forward to the 4:00 minute mark in the following video you can see where the damage occurs.  Someone should make replacement gears that are metal or at least more durable than the nylon ones currently used.

Small | Large

All shot with a 60D and various adapters.

Pentax Super-Takumar 50mm f1.4: http://www.jongilchristphotography.com/Resources/Testing/Super-Tak-50-14/24242539_QgTx5q

Several bokeh tests, including a Canon FL 55mm f1.2 and an Olympus/Zuiko 35mm f2.8 Shift Lens: http://www.jongilchristphotography.com/Resources/Testing/Bokeh-Tests/28858427_phQ5Bq

Some cheapo 400mm and 500mm Rokinon/Quantaray/Opteka/Samyang long teles:  http://www.jongilchristphotography.com/Resources/Testing/400mm-500mm-1000mm/29053611_bVQ7hx

A whole bunch of various relatively fast lenses.  Good luck figuring out all the particulars but in general I would shoot a full range of apertures, each aperture being shot with a 3-shot bracket.  http://www.jongilchristphotography.com/Resources/Testing/Fast-Lenses-not-85-12/17031248_SjmWdT

I'm selling most of these lenses, so if you're interested drop me a pm.

EOS Bodies / Re: Canon EOS 70D Coming in July? [CR2]
« on: May 21, 2013, 03:13:06 PM »
Has anyone done any testing on the SL1 sensor to give an idea of what might be in store for the 70D? It seems odd that you can buy one at B&H but no one has done an in-depth review.

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