Comments on: 60D Spec List? [CR1]

By: Rocky

Rocky — Thu, 01 Jul 2010 05:06:38 +0000

I have looked through the test report from DPReview. It turned out that the 18-55mm IS lens have more than enough resolution for the 350D (8MP). Its resolution is actually closed to be 13.5 Mp at the middle of the sensor. That is why it looks better on the 15MP 50D. Even that we are not fully utilize the 15Mp of the 50D.
On the other hand , if a 50mm f1.8 II is stopped down to F5.6. it will have more than 15MP resolution (at least at the middle of the sensor). That is fully utilize the 15MP sensor of the 50D. That is the reason why this cheap plastic lens is being revere by a lot of people.
Now the question is: What lens is good enough to give us the 18MP resolution of the 7D.
I just cannot agree that we should let the sensor out resolve the lens. In order to get the most out of the system, the performance of the lens should match the sensor. If I have a choice, I would go the opposite way. Let the lens out resolve the sensor. By doing that we know we have got the most out of the sensor. If there is a higher resolution sensor coming up later, we do not need to obsolete the lens(es) along with the camera. It is economically and technically sound in the long run.

By: Rocky

Rocky — Wed, 30 Jun 2010 21:23:12 +0000

I would like to read the report. Can you give me the actual web site. I try to find it in Photozone.com, I cannot find it. Thanks for the help in advance.

By: John Swan Mark II TEAM

John Swan Mark II TEAM — Wed, 30 Jun 2010 14:07:55 +0000

It is better for the sensor to outresolve the lens than the other way around, because at least you know you are maximizing the performance of the lens. Even the 18-55 kit lens shows more resolution on the 15MP 50D than on the 8MP 350D according to Photozone’s tests.

By: Rocky

Rocky — Wed, 30 Jun 2010 05:47:15 +0000

Have you ever shoot slide films and show them with a slide projector???

By: rOCKY

rOCKY — Wed, 30 Jun 2010 04:04:55 +0000

I agree that “light cropping” should always be an option. that is why I was using 20% crop as a case and point. However, if someone is always using ‘heavy cropping ” and end up using less than half of the original pixels, then he shall re examine his framing (composition ) technique.

By: jono

jono — Wed, 30 Jun 2010 02:17:15 +0000

cropping should always be an option. Always.

By: Rocky

Rocky — Tue, 29 Jun 2010 16:16:55 +0000

I agree that additional pixel for “light cropping” is a necessity. Let us assume it will be nice to have 20% in linear dimension for cropping. This will need only 10.8 MP. so I think the 12MP for APS-C will be a good number. At that pixel level , we still need lens that can resolve 95 lp/mm. That is already a demand for very good prime lens and “L” lens. I really feel that the 18Mp sensor now is a marketing decision not based on existing data of the performance of the lens and reality.
The 18MP sensor needs alens that can resolve 106 lP/mm. I am wondering how many lens can do that . Even the real (read it as expensive) Leica lenses will not make that claim.

By: Rocky

Rocky — Tue, 29 Jun 2010 15:25:42 +0000

Slide are shown with slide projector. it you want picture, you shoot color negative. As for 8 X10 Or 5 X7, your crop the top and bottom out.

By: xabi

xabi — Tue, 29 Jun 2010 14:37:09 +0000

Jason, I would consider myself a “purist” but I don’t knock articulated screens. Whilst I can see the advantages you detail, I would say that kneeling/laying on damp peatland grass is even better example of the benefits of these screens!

Rocky, I too like articulated screens. I’m also old enough to remember some of your examples but I rather think the reasons the 6×6 Rolleiflex had a WLF were cost, convenience, and the weight of a large glass prism – and especially the square format! [try a vertical shot with a Nikon F with WLF!]. Of course the articulated LCD gets round these issues making them very useful.

Hutjeflut, I do think your suggestion of different versions has merit, but I fear the result would be that both versions were more expensive.

By: Maxim Harper

Maxim Harper — Tue, 29 Jun 2010 14:20:11 +0000

Mah I had not apreciated the arrival of that :/
15-85 it is :)

By: xabi

xabi — Tue, 29 Jun 2010 14:09:02 +0000

Would back you up on that one. I can only hold a camera with one hand [my right] and have found Canon Rebel ergonomics better for my needs than either Nikon DSLR or Canon xxD. But I would go for a slightly larger body and grip with better build quality and viewfinder any day. The hinged LCD would be a very desirable extra, especially if it were convenient for waist level viewing.

By: asu

asu — Tue, 29 Jun 2010 14:06:50 +0000

iso 6400 is more than enough for me, its make me embarce the use of slow speed n high aperture lens

By: Joel

Joel — Tue, 29 Jun 2010 13:35:37 +0000

Huh? You mean Canon is coming out with a new 17-85 IS USM? I thought the 15-85 was its replacement.

By: aye

aye — Tue, 29 Jun 2010 12:31:02 +0000

I agree for the most part, but perfect composition isn’t always possible when photographing subjects which aren’t posing. This is especially true when using primes.