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Topics - joshmurrah

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Lighting / cheaper flashes with optical slave to Canon 600 RT
« on: December 26, 2014, 09:38:18 PM »

So I'm looking at Westcott's 7' parabolic, and I have an issue that I don't want to use all three of my 600RTs to power the light inside this big guy. 

I have a triple shoe adapter, but I was wondering, can I put in a 600EX-RT and two cheaper yongnuo flashes for the other two flashes?  Has anyone tried this and see what it does to your maximum sync speed with optical slaving, does it lower it beyond 1/160 that my 5D3 will reliably handle??


Portrait / my iced over car in Mobile, AL (Brenizer Method)
« on: January 30, 2014, 03:29:45 PM »

I watched the Brenizer video, and have been trying out this method, in preparation for actually using it on people.  It's tricky to do this type of pano by hand IMO.  85mm @ f/1.2, 51 images.

Lenses / miniaturized WA lens tech, compared to 8-15L
« on: September 26, 2013, 09:42:48 AM »
Found this via Engadget.

Pretty bold claim on being able to provide a high resolution fisheye FOV in the palm of your hand that beats out the EF 8-15L.  Neat stuff!

Lenses / weather-seal gasket replacement
« on: January 21, 2013, 09:51:36 AM »

My wife bought me a 16-35 II at the LensRental sale last cyber monday.  I'm loving the lens, however there's several nicks in the weatherseal gasket on the back.

I'm aware that this is really easy to replace, however I have no idea where to source the gasket part itself.

Does anyone know where/how I can obtain this part?

Landscape / Happy New Years from the Mobile, AL area!
« on: January 01, 2013, 10:55:30 AM »

May the New Year bring you fortune and good tidings!

5D2, 16-35 II, f/5.6 bulb mode (< 8 seconds) with cable release.  Multi-shot pano for the neighborhood, then left the tripod's rotation unlocked, so that I could rotate it to catch fireworks.  Matched them up to the pano via layers in CS6.

Third Party Manufacturers / Samyang (Rokinon) 8mm fisheye version 2 (HD8M)
« on: December 30, 2012, 04:14:20 PM »

There's apparently a version 2 of the excellent 8mm South Korean fisheye lens out, that has a removable hood.

Has anyone had experience with this version 2 lens?  Does it give you a FULL circular?  My research seems to indicate no.

Software & Accessories / B+W "Kaesemann" CPL versus regular
« on: December 26, 2012, 10:38:29 AM »

I'm looking at a 82mm slim-line CPL for my 16-35II... I bought the Kaesemann last time (77mm size), but questioning paying the extra this time.

Is the moisture-proof foil worth it, what'd you guys go with?

edit: ok it's only $40 extra, not a huge deal.  I'd still like to see what experiences you guys have had.

Third Party Manufacturers / Rokinon 14mm f/2.8
« on: October 25, 2012, 09:10:45 AM »

I dug through the forums here, and I didn't see a dedicated thread (there was some good info in the 12-24mm thread tho).

I'm looking into this lens mostly for astrophotography, so I can shoot a wide view of night skies, milky way mostly.

I tried this out with my 24-105 for the meteor shower last weekend, and found that I need something faster, and something wider, so the Rokinon seems to satisfy both of these needs.

I have two big questions:

1)  does anyone have any experience shooting at infinity @ f/2.8 with this lens, does it have a fairly flat field of focus?
2)  Has anyone had experiencing correcting the strong distortion in ACR 7?  Is there a profile for a FF camera plus this lens in it that works well?

And of course, any general opinions about this lens would be great.

Thanks in advance!!

Lenses / 24-105 on FF, or 17-55 on crop?
« on: September 24, 2012, 04:16:00 PM »

I recently stepped up to a fullframe kit, and have been trying out the 24-105 that came in the kit.

I didn't, however, have the extra cash to step up to a full-frame short 2.8 zoom ($2300!!).  I previously used a 7D and 17-55 for this.

Question to the great pool of talent here... should I keep my 17-55 for a short 2.8 zoom, or take a hit on low light and use the 24-105?  

Seems like the OOF area and IQ differences will sortof balance out (the FF can go a stop faster, same rough IQ, with the same light, but the lens is a stop slower)

However, I'm thinking about keeping the 7D and 17-55 so that I can get better hit on focus in low light (2.8 focus points versus f/4).


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