There is how does the code look like on index:
<div class="big-image">
<?php $image = get_post_meta($post->ID, 'bigimage', true); ?>
<a href="<?php the_permalink(); ?>" title="<?php the_title(); ?>">
<img src="<?php echo $image; ?>" alt="<?php the_title(); ?>" width="280" height="196" />
</a>
</div>
