HPX250: Trying to decide on the 250 (Long)

Mike Warren

Well-known member
I'm probably in a different position to most people here. I used to shoot professionally about 30 years ago using U-matic/3 tube cameras and 16mm, but have worked in the electronics industry for many years. I did shoot events in the late 80s and early 90s on a part time basis, but have been away from video for some time. I missed the whole DV period.

My interest has been sparked again in the last few years and I'm looking for a reasonable camcorder. This will be purely for hobby use, although I won't object to doing some paid work to help justify the cost of the camera and accessories. I like to shoot wildlife (and shoot stills now with a dSLR and video with a consumer camcorder) and would also like to get into some music videos.

These three new Panasonics are the first to really interest me, because of the combination of the lens and the price, but I'm not keen on P2. It seems to me that using dual recording with quality SD cards on a 160 will not carry any greater risk of lost data than using a single P2 card, so the only real benefit to me of P2 is not significant. So, the 160 should be the camera for me, but I'm concerned about AVCCAM when it comes to green screen work. There is also the very small possibility that I might actually produce a wildlife program interesting enough for TV, although I'm not under any illusion that it's a real possibility. :)

If the 250 was just a 160 with improvements then I could overcome my reluctance of P2 and the extra cost. But it's not. The 250 has to drop back to 720p in order to get overcrank functions and overcrank is an important function for me. This may not be as much of an issue as I'm expecting if the lens is not sharp enough to resolve the full 1080p image, but the way people are talking, I think it probably is.

I will be using Adobe Production Suite on Win7 for editing. Getting the files from SD cards is easy. I already have card readers and they are cheap and readily available anyway.

What will I need to get the files from the P2 cards onto the computer? I assume a USB cable from the camera is one option, but is it a practical one considering the file sizes of AVCIntra100. I'm not sure what P2 readers are available, but I'm guessing these will be expensive.

The 1/3" chips bother me as it is, mostly because the range of usable apertures is seriously restricted. I'm not used to needing to worry so much about diffraction because the old cameras were 3/4 inch and the resolution of the format wasn't as unforgiving as HD.

One thing that really bothers me about modern consumer camcorders it the highlight handling. As I understand it , the 250 handles highlights better than the 160. There is also flash band compensation only in the 250. I expect that to be a slight benefit in shooting live music. Can this be done as well in post? It seems like all the camera is doing is duplicating frames.

Sorry for the long rambling post. I want to get a detailed understanding of what I will need to do to work with P2, and I also would like to get other people's opinion of which way they would go in my situation.
 
The advantage of the P2 work flow is the much better codec, even if you don't think P2 cards are a more reliable memory media. The 250 has a 20-bit DSP, this is a big deal to me, it's the first Panasonic palmcorder that handles highlights more like a Varicam. Does the 160 have a 20-bit DSP? I'm really impressed with the 250 so far--I think it's an incredible value at $5300 plus cards.
 
Read your entire post, before getting kids to bed I wanted to at least let you know there is a single Panasonic USB P2 card reader in the $300 range. It uses 2 USB 2.0 cables for connection (1 for power, 1 for transfer) it works well, solid and fairly quick considering it is USB2.0.

I use P2 workflow entirely and I must say it is a pleasure to work with and AVC Intra is wonderful, a strong, solid codec that does not require as much processor as AVCCAM. I too am looking at the HPX250 to marry with our HPX300.

More later and I am sure others more knowledgeable than I will chime in.
 
Thanks for your reply, Jeff.

The advantage of the P2 work flow is the much better codec, even if you don't think P2 cards are a more reliable memory media.

I do think P2 is more reliable, but I don't believe the difference is significant as long as 2 SD cards are being simultaneously recorded and the equipment is handled properly.

The 250 has a 20-bit DSP, this is a big deal to me, it's the first Panasonic palmcorder that handles highlights more like a Varicam.

I read your post about that. It would be nice (and I would be able to decide quite quickly) if I could just get hands on with both cameras for a few hours, but I live in a small city (Cairns, Australia) where there are no pro video dealers at all.

Does the 160 have a 20-bit DSP?

I understand the 160 and 130 to have 18 bit DSP.
 
I wanted to at least let you know there is a single Panasonic USB P2 card reader in the $300 range. It uses 2 USB 2.0 cables for connection (1 for power, 1 for transfer) it works well, solid and fairly quick considering it is USB2.0.

Thanks Jason. That's not as bad as I was expecting.
 
Would love to hear more about the 250's highlight handling (don't quite understand the 18vs20 DSP thing). I'm in a similar boat, considering the 250, and highlight handling is important to me. Jeff, when you say the 250 is closer to a varicam with highlights, could you explain a bit? Thanks!
 
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(don't quite understand the 18vs20 DSP thing).

Since we don't know the specific implementation all we can really say is that the 20 bit digital signal processor chip inside the 250 is more powerful than the 18 bit one inside the 160/130.

It's not likely Panasonic would have used a more expensive DSP unless they are making use of it. I expect part of that power is being used in the noise reduction (PAP filters), but it could, in theory, also be put to good use for better knee processing.

A more pleasant picture is achieved if the intensity is scaled back gradually as the light approaches the point of blowout. More detail is retained in the highlights. Consumer camcorders don't, AFAIK do any processing here and anything approaching white tends to get blown out.
 
The knee is entirely different on the 250, as compared to any of the prior AG series (excepting, of course, the 300/370).
 
I think the OP said he was using Winfows 7…. And, don't forget, you can use the camera as a card reader, and can use any old laptop with cardbus slots as a reader. The Green Barry started a thread long ago about the use of cheap pc laptops as networked card readers… I myself bought an old thinkpad plus a docking station for it; this let's me mount four P2 cards at once… total investment was about $200 US. Probably even cheaper now! This was a T42 I think; there's a narrow range of laptops that have both gigabit Ethernet and 2 cardbus slots.… and I'm not sure how many of those give you two MORE cardbus slots with a docking station… but the t42s were popular and there seem to be many around dirt cheap.
 
I can confirm that the Amtron PCD-TP-110CS works very well in a win7 64 PC. No drivers required for the Amtron, but you do need to install Panasonic's P2 drivers. Fast, hot swap, all for under $100.
 
I can confirm that the Amtron PCD-TP-110CS works very well in a win7 64 PC. No drivers required for the Amtron, but you do need to install Panasonic's P2 drivers. Fast, hot swap, all for under $100.

That would make me very envious, but not enough to switch. Said with wry smile.

Grant
 
Mike. Thanks for the nice explanation of how DSP might effect highlight handling. Wouldn't it be super helpful to see a side by side test comparing various cameras clipping to highlights? Say, 160/250/170/ex1.
 
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Would love to hear more about the 250's highlight handling (don't quite understand the 18vs20 DSP thing). I'm in a similar boat, considering the 250, and highlight handling is important to me. Jeff, when you say the 250 is closer to a varicam with highlights, could you explain a bit? Thanks!

More bits in the DSP offers more precision in each camera control circuit. As Barry has posted, the 250 handles highlights like an HPX300/370. What I see with the 18-bit Panasonic cameras, including the HPX500, is chroma clipping and posterization. It's sort of like a knee saturation circuit, where highlights have a super chroma color inserted, instead of just luminance clipping to white. I don't like knee saturation and turn if off/down in any camera that has it. I do not need detail in highlights either, film cameras don't add artificial detail in highlights.

The 250 is a 10-bit camera when recording in AVC-Intra or outputting via HD-SDI. This makes a difference vs. the normal 8-bit Panasonic palmcorders, not just recording but live out of the camera in color depth, reduced posterization. Varicams, tape or P2, look very natural in highlight handling to me, especially with the new P2 Varicams having a 32-bit DSP and 600% dynamic range setting with Film-Rec gamma. The Panasonic palmcorders look the exact opposite to me--it's a tell tale sign of a cheap video camera to my eye.

HPX250 gets closer to the Varicam look--this is exciting to me. I had preferred the EX1 for highlight handling(although no Varicam), now with the HPX250, we have a competitive front end to the EX1 and EX3, and a much better recording section. Plus the great lens, LCD display, Time Code in/out(which I've used to slave it to our HPX2700), genlock in, knee control in all gammas, including Cine gammas, Cinelike matrix that is quiet, unlike the AF100, and a great SN ratio, albeit at the cost of some sensitivity(PAP default setting 2). This camera is GREAT for my corporate clients!
 
More bits in the DSP offers more precision in each camera control circuit. As Barry has posted, the 250 handles highlights like an HPX300/370. What I see with the 18-bit Panasonic cameras, including the HPX500, is chroma clipping and posterization. It's sort of like a knee saturation circuit, where highlights have a super chroma color inserted, instead of just luminance clipping to white. I don't like knee saturation and turn if off/down in any camera that has it. I do not need detail in highlights either, film cameras don't add artificial detail in highlights.

The 250 is a 10-bit camera when recording in AVC-Intra or outputting via HD-SDI. This makes a difference vs. the normal 8-bit Panasonic palmcorders, not just recording but live out of the camera in color depth, reduced posterization. Varicams, tape or P2, look very natural in highlight handling to me, especially with the new P2 Varicams having a 32-bit DSP and 600% dynamic range setting with Film-Rec gamma. The Panasonic palmcorders look the exact opposite to me--it's a tell tale sign of a cheap video camera to my eye.

HPX250 gets closer to the Varicam look--this is exciting to me. I had preferred the EX1 for highlight handling(although no Varicam), now with the HPX250, we have a competitive front end to the EX1 and EX3, and a much better recording section. Plus the great lens, LCD display, Time Code in/out(which I've used to slave it to our HPX2700), genlock in, knee control in all gammas, including Cine gammas, Cinelike matrix that is quiet, unlike the AF100, and a great SN ratio, albeit at the cost of some sensitivity(PAP default setting 2). This camera is GREAT for my corporate clients!
now i want an af100 version of hpx250 next year :)
 
Seeing as the 250 supposedly uses the same or similar sensor/processor block as the 370, it should have similar highlight handling, so I shot some frames of high-contrast scenes on my 370.

http://i418.photobucket.com/albums/pp263/ThisIsHey/Flower_f-28_-3db.jpg

http://i418.photobucket.com/albums/pp263/ThisIsHey/720p_broad_daylight.jpg

http://i418.photobucket.com/albums/pp263/ThisIsHey/ND4_f4_-3db.jpg

http://i418.photobucket.com/albums/pp263/ThisIsHey/heatwave_f-4_-3db.jpg

What do you guys think, is the DR or highlight handling acceptable? Similar to the 250?
 
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