В компонентке photo.sections.top в параметрах добавьте выбор поля "Детальная картинка".
Т.е. вызов компоненты вот так выглядит.
[CODE]
<?$APPLICATION->IncludeComponent("bitrix:photo.sections.top", ".default", array(
"IBLOCK_TYPE" => "gallery",
"IBLOCK_ID" => "9",
"SECTION_SORT_FIELD" => "sort",
"SECTION_SORT_ORDER" => "asc",
"ELEMENT_SORT_FIELD" => "sort",
"ELEMENT_SORT_ORDER" => "asc",
"FILTER_NAME" => "arrFilter",
"FIELD_CODE" => array(
0 => "",
1 => "DETAIL_PICTURE",
2 => "",
),
"PROPERTY_CODE" => array(
0 => "",
1 => "",
),
"SECTION_COUNT" => "20",
"ELEMENT_COUNT" => "9",
"LINE_ELEMENT_COUNT" => "3",
"SECTION_URL" => "",
"DETAIL_URL" => "",
"CACHE_TYPE" => "A",
"CACHE_TIME" => "3600",
"CACHE_FILTER" => "N",
"DISPLAY_PANEL" => "N"
),
false
);?>
[/CODE]
Теперь в шаблоне тебе доступен путь к детальной картинке $arItem["DETAIL_PICTURE"]["SRC"]. Ну и все впринципе, теперь в шаблоне
[CODE]
<a target = "_blank" href="<?=$arItem["DETAIL_PICTURE"]["SRC"]?>">
<img border="0"
src="<?=$arItem["PICTURE"]["SRC"]?>"
width="<?=$arItem["PICTURE"]["WIDTH"]?>"
height="<?=$arItem["PICTURE"]["HEIGHT"]?>"
alt="<?=$arItem["PICTURE"]["DESCRIPTION"]?>"
title="<?=$arItem["NAME"]?>" />
</a>
[/CODE]