October 23, 2014, 11:51:58 AM

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Messages - sagittariansrock

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46
Lenses / Re: Canon APS-C<Speedbooster<EF Lens. Possible?
« on: September 23, 2014, 10:53:50 PM »
Hi people!

I am sorry if this a stupid question but I have to ask in order to learn.

Is possible such a combination?: A Canon crop camera with a (I think not existing)speedbooster and any EF lens in order to gather the "extra" light the lens is providing and the sensor, due to its smaller surface, is not able to use. Would it improve APS-C sensor ISO performance?

Thanks in advance and sorry if it is a completly dumb question.
Hi,
    Speedbooster is basically a focal reducer. IMHO, it's had nothing to do with sensor size as long as the original lens produce an image circle that can cover the sensor, but focal reducer will usually reduce the distance where the image is focus on, so it's difficult (if possible) to maintain flange focal distance of any lens and mount of the same type. That's why speedbooster only appear for SLR lens to mirrorless mount, so speedbooster for EF lens to EF mount might not be possible, but speedbooster for EF lens to EF-M mount is possible.

    Have a nice day.


Actually, it's a question of a physical entity (set of lenses) being interposed between the rearmost lens element and the camera mount. It might not be impossible with the Canon telephoto lenses that can take a teleconverter (and consequently have free space behind the rearmost lens element). The Speedbooster is essentially the exact opposite of a teleconverter.

To answer a question the OP had asked, yes- it does increase the amount of light. The Metabones one increases the equivalent angle of view by .71x and the light by 1 stop IIRC. And I am probably generalizing- these numbers might be specific to FF>APS-C. Too late for me to think it out :)

47
Lenses / Re: Canon APS-C<Speedbooster<EF Lens. Possible?
« on: September 23, 2014, 10:26:14 PM »
I believe it is technically possible with the mirror less EF-M due to the small flange distance from the mount to the mirror (so additional converging elements like a speed booster can be interposed). Most likely not with a EF-S SLR mount.
I think the hangup with the EF-M is that Metabones probably doesn't want to commit resources into developing it until they know whether or not Canon will continue the line.

Edit: FYI, Metabones already makes Speedboosters for the NEX line of MILCs.



48
Lenses / Re: Do you keep all your boxes?
« on: September 23, 2014, 06:01:13 PM »
I generally keep my boxes for the resale value thing, but could not keep those for my 24-70II, 35L, 135L, TS-E 17mm and the 1.4xIII and 2xIII tele-converters because they got shipped to my family home.

Now, hopefully I will not have to resell any of these (confident about the 24-70II, TS-E 17mm and the tele-converters not so much about the others), and the space saving has been enormous. However, it does worry me. Where can one get used boxes? Would it not have a different serial number? If detected, wouldn't that create a worse impression than not having a box? Dunno...

49
Photography Technique / Re: Square or not?
« on: September 22, 2014, 07:33:35 PM »
I liked the rectangular orientation better. Two reasons:
The orientation of the subject in the rectangular frame is more appealing to me as it feels like it's slowly spreading (spilling?) outwards on two sides.
The black space on the sides seem to enhance the brightness of the subject and acts as a negative space where the spill (as above) would spread out.

I generally crop this kind of images square, but this special case seems to need a different treatment in my opinion.

50
EOS-M / Re: EOS M Accessory question
« on: September 21, 2014, 10:57:01 PM »

The Dashpoint 20 is a good fit for the M+22.  I use a hard case for storage and travel with my M system now.  I use the Think Tank Mirrorless Mover 20 to carry the M, 2 lenses, batteries, etc when I'm out and about.  I also have a 3" aluminum rod tube to carry my M, 2 lenses, and accessories when I'm hiking/backpacking.

The Dashpoint 20 has arrived, and I love it!
What is a rod tube?!?

Sorry, custom aluminum tube for fly rods that I had made to carry my M safely in a backpack when I was getting one made for a new Tenkara fly rod.  Here's the post
http://www.canonrumors.com/forum/index.php?topic=21824.msg427946#msg427946

Here's the local shop that made mine - http://www.landmarkflyrodtubes.com/

Wow! That's very innovative!

51
Photography Technique / Re: POLL: Did you peak and what did you do about it?
« on: September 21, 2014, 08:21:16 PM »
voted option one and adding- 'hopefully'.

52
EOS Bodies / Re: Interview hints to future new Canon mount type
« on: September 21, 2014, 03:11:28 PM »
Whatever improvements Canon might make elsewhere, they won't be competitive in the sub-APS-C market unless they really improve their sensors.
That is only my opinion, of course.

53
EOS Bodies / Re: Interview hints to future new Canon mount type
« on: September 21, 2014, 12:41:55 PM »
http://photorumors.com/2014/09/20/canon-is-considering-a-new-mount-system/#more-62364

Maybe a new future mirrorless system that tries to find a good balance between size and iq. Quite interesting rumor. If Canon would release a new mount system, they would probably not maintain all those they have now (likely EF-M).

I don't see how the observation leads to that conclusion. He was speaking of a mount for <APS-C sensors. EF-M is APS-C. They might maintain both lines, as Sony has done.

54
EOS-M / Re: EOS M Accessory question
« on: September 21, 2014, 02:41:23 AM »
I didn't really like the 50/1.4 though (bought and sold it 3 times), so I am thinking on the FD 50mm lines.

Just out of curiosity, what didn't you like about the 50/1.4?  Is it anything that the on-sensor AF of the M would solve?

What I didn't like about the 50/1.4 now (my 2nd and 3rd copies, after going full frame) is that it isn't tack sharp wide open or even below 2.8 (after which it is totally fine). However, my 24-70 II is as sharp if not sharper wide open. So I don't see the advantage of carrying the prime around (the 24-70 II is a bit of a prime killer :) ). My second copy was also front focusing a bit which wouldn't work with my 5Dc (no AFMA).
The other thing was the zoom has better color and contrast than the 50.
For portability I have the 35/1.4 and had the 40/2.8 (now replaced by the M+22 as my new compact kit).

Earlier, I used to own the 50/1.8 when I bought the 50/1.4 and the latter didn't seem a huge improvement over its thrice as cheap brother.

M+cheap FD lenses+focus peaking using ML sounds like a fun proposition!

55
EOS-M / Re: EOS M Accessory question
« on: September 21, 2014, 02:35:33 AM »
I use the Flipbac 4 rubber 'peel and stick' grip along with the Canon ER-E1 wrist strap and this combo makes it very hand-holdable with one hand.
The Flipbac grip is wide and not that thick. How does it compare to the DSLR grip in terms of handling. Rubber grip will give you a better traction for sure.

Thanks for the suggestion for the Flipbac and the Franiec. I ended up going the grip+Arca swiss adapter route with the ebay thingy BL has posted.

56
EOS-M / Re: EOS M Accessory question
« on: September 21, 2014, 02:34:30 AM »
I use the Canon EOS M jacket & strap that came with my kit. My version is black, while this picture is the red one
http://www.slashgear.com/canon-eos-m-japan-reveals-accessories-coming-late-september-23239853/

I prefer it to just a rubber grip. It makes the whole M much comfort in my hands.
The con is that you'll have to take it off when changing battery or card.

Wow! Nice one. I might look out for it. This is grip, strap and case all in one!

57
EOS-M / Re: EOS M Accessory question
« on: September 21, 2014, 02:31:49 AM »
+1 for the Think Tank Mirrorless Mover. I have the 100 so it's small enough to fit inside a larger backpack for flying and traveling etc. It just fits camera, 22/2 and 11-22 with hood.

The mirrorless mover looks really nice and is nicely priced, but I have a Lowepro Rezo 170 that can serve that purpose if and when I get more M-specific lenses. Good suggestion, though.
I wasn't going to use the strap, so wanted a bag that I can have on the side that essentially doubles as a strap for the camera and is almost the same size.

The Dashpoint 20 is a good fit for the M+22.  I use a hard case for storage and travel with my M system now.  I use the Think Tank Mirrorless Mover 20 to carry the M, 2 lenses, batteries, etc when I'm out and about.  I also have a 3" aluminum rod tube to carry my M, 2 lenses, and accessories when I'm hiking/backpacking.


The Dashpoint 20 has arrived, and I love it!
What is a rod tube?!?


1. Canon EF-EF-M adapter:
got it. Use it ever so often ... primarily for tele with EF-S 55-250 IS STM and with EF 40/2.8 STM. STM lenses are the only ones I find working reasonably well as far as AF is concerned. Also use EF-S 60 Macro for close-ups.
3. Batteries: got 2x original LP-E12 + 2x Patona. I need all 4 for a day of shooting. Patona are OK-ish, but originals are clearly better, hold more charge. Don't do video at all.

I see, thanks! I suppose I will wait on the adapter then...
I heard the Wasabis are better than OEM. Now I wonder...





58
EOS-M / Re: EOS M Accessory question
« on: September 21, 2014, 02:23:06 AM »
Found something really cool to maybe create a grip, called Sugru.
Anybody used this before? How strong is it?
www.sugru.com

You made me spend almost two hours dreaming possibilities to use this wonderful material to do some DIY projects. Thanks for letting us know about the existence of this thing.

Just wonder if one could make use of it to design some sort of weather seal on lenses, camera and battery grip etc etc.

Glad to be of help. It has affected me very similarly.
However, let me say this: using a gasket at the mount with non-sealed lenses does not seal the numerous other places moisture or dirt may get in. It only creates a false sense of security. Same with cameras. So unless you are familiar with the entire build and know all the gaps to fill or planning to coat the whole thing with sugru  :o I don't recommend it.

59
You're kidding me!!!  :o
Why not in the US?  :'(

Dunno... we're closer to Santa Claus?..

I'm thinking I get to test drive a 7d2 and 24-70/4 L lens then sell it off for a profit on eBay. :}

The 24-70 will be cheaper than their new standard zoom  :o
AND I get to keep the jacket!  ;)

Don't tell me you're not planning on putting those amazing skins on all your iPhones and iPads.
But seriously, great deal...
HAHA!  No iPhone, no iPad, never will. Hate those things and how iOS works.
Doubt it would fit my 10" Asus tab .

And, pre-order was placed earlier this week so will now wait and see what the 7d2 can do for me.


It'll look beautiful on your Asus tab, but remember: the correct way to put skins on Android phones and tabs is to put it on the LCD side so it can be covered up :P
I preordered it from Henry's, too.
Fingers crossed :)

60
Third Party Manufacturers / Re: Favourites of Photokina: Peak Design
« on: September 20, 2014, 03:51:42 PM »
Just did the test, 3 of my 4 springs failed on the slide...not too happy, but glad I found out before I put them on my cameras, unlike the unlucky people that actually had their cameras drop.  I hope PD is paying for any repairs necessary.

There were about 50 affected customers at the time when they sent out the advisory, so no additional people should be affected unless they didn't access to their emails.

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